Program for Volume and Surface area of Frustum of Cone

Given slant height, height and radius of a frustum of a cone, we have to calculate the volume and surface area of the frustum of a cone.

Frustum of cone
In geometry, a frustum is the portion of a solid (normally a cone or pyramid) that lies between one or two parallel planes cutting it.
If we cut a right circular cone by a plane parallel to its base, the portion of the solid between this plane and the base is known as the frustum of a cone.

Given below is a right circular cone.

The right circular cone after being cut by a plane parallel to its base results in a frustum as follows:

which has a circular base at bottom of radius R
circular upper portion with radius r
height h
and slant height l

• Volume of frustum of cone:

Volume (V) = 1/3 * pi * h(r2 + R2 + r*R)

where
r = radius of smaller circle
R = radius of bigger circle (or radius of base of the cone)
h = height of the frustum

• Curved Surface Area of frustum of cone:

Curved Surface Area (CSA) = pi * l(R + r)

where
r = radius of smaller circle
R = radius of bigger circle
l = slant height of the frustum

• TotalSurface Area of frustum of cone:

Total Surface Area (TSA) = pi * l(R + r) + pi(R2 + r2)

where
r = radius of smaller circle
R = radius of bigger circle
l = slant height of frustum

Examples:

Input : Radius of smaller circle = 3
        Radius of bigger circle = 8
        Height of frustum = 12
        Slant height of frustum = 13
Output :
Volume Of Frustum of Cone : 1218.937
Curved Surface Area Of Frustum of Cone : 449.24738
Total Surface Area Of Frustum of Cone : 678.58344


Input : Radius of smaller circle = 7
        Radius of bigger circle = 10
        Height of frustum = 4
        Slant height of frustum = 5

Output :
Volume Of Frustum of Cone : 917.34436
Curved Surface Area Of Frustum of Cone : 267.03516
Total Surface Area Of Frustum of Cone : 735.1321

C++
// CPP program to calculate Volume and
// Surface area of frustum of cone
#include <iostream>
using namespace std;

float pi = 3.14159;

// Function to calculate Volume of frustum of cone
float volume(float r, float R, float h)
{
    return (float(1) / float(3)) * pi * h *
                    (r * r + R * R + r * R);
}

// Function to calculate Curved Surface area of
// frustum of cone
float curved_surface_area(float r, float R, float l)
{
    return pi * l * (R + r);
}

// Function to calculate Total Surface area of
// frustum of cone
float total_surface_area(float r, float R, float l,
                                           float h)
{
    return pi * l * (R + r) + pi * (r * r + R * R);
}

// Driver function
int main()
{
    float small_radius = 3;
    float big_radius = 8;
    float slant_height = 13;
    float height = 12;

    // Printing value of volume and surface area
    cout << "Volume Of Frustum of Cone : "
         << volume(small_radius, big_radius, height)
         << endl;

    cout << "Curved Surface Area Of Frustum of Cone : "
         << curved_surface_area(small_radius, big_radius,
                                 slant_height) << endl;

    cout << "Total Surface Area Of Frustum of Cone : "
         << total_surface_area(small_radius, big_radius,
                                 slant_height, height);
    return 0;
}
Java
// Java program to calculate Volume and Surface area
// of frustum of cone

public class demo {

    static float pi = 3.14159f;

    // Function to calculate Volume of frustum of cone
    public static float volume(float r, float R, float h)
    {
        return (float)1 / 3 * pi * h * (r * r + R * R +
                                                r * R);
    }

    // Function to calculate Curved Surface area of
    // frustum of cone
    public static float curved_surface_area(float r,
                                   float R, float l)
    {
        return pi * l * (R + r);
    }

    // Function to calculate Total Surface area of
    // frustum of cone
    public static float total_surface_area(float r,
                         float R, float l, float h)
    {
        return pi * l * (R + r) + pi * (r * r + R * R);
    }

    // Driver function
    public static void main(String args[])
    {
        float small_radius = 3;
        float big_radius = 8;
        float slant_height = 13;
        float height = 12;

    // Printing value of volume and surface area
        System.out.print("Volume Of Frustum of Cone : ");
        System.out.println(volume(small_radius,
                            big_radius, height));

        System.out.print("Curved Surface Area Of" +
                            " Frustum of Cone : ");
        System.out.println(curved_surface_area(small_radius,
                                  big_radius, slant_height));
        System.out.print("Total Surface Area Of" +
                " Frustum of Cone : ");

        System.out.println(total_surface_area(small_radius,
                        big_radius, slant_height, height));
    }
}
Python3
# Python3 code to calculate
# Volume and Surface area of
# frustum of cone
import math

pi = math.pi

# Function to calculate Volume
# of frustum of cone
def volume( r , R , h ):
    return 1 /3 * pi * h * (r
            * r + R * R + r * R)

# Function to calculate Curved
# Surface area of frustum of cone
def curved_surface_area( r , R , l ):
    return pi * l * (R + r)

# Function to calculate Total
# Surface area of frustum of cone
def total_surface_area( r , R , l , h ):
    return pi * l * (R + r) + pi * (r
                            * r + R * R)

# Driver Code
small_radius = 3
big_radius = 8
slant_height = 13
height = 12

# Printing value of volume
# and surface area
print("Volume Of Frustum of Cone : "
                                ,end='')
print(volume(small_radius, big_radius,
                                height))

print("Curved Surface Area Of Frustum"+
                    " of Cone : ",end='')
print(curved_surface_area(small_radius,
                big_radius,slant_height))

print("Total Surface Area Of Frustum"+
                    " of Cone : ",end='')
print(total_surface_area(small_radius,
        big_radius,slant_height, height))

# This code is contributed by "Sharad_Bhardwaj".
C#
// C# program to calculate Volume and
// Surface area of frustum of cone
using System;

public class demo {

    static float pi = 3.14159f;

    // Function to calculate
    // Volume of frustum of cone
    public static float volume(float r, float R, float h)
    {
        return (float)1 / 3 * pi * h * (r * r + R *
                                        R + r * R);
    }

    // Function to calculate Curved
    // Surface area of frustum of cone
    public static float curved_surface_area(float r,
                                float R, float l)
    {
        return pi * l * (R + r);
    }

    // Function to calculate Total
    // Surface area of frustum of cone
    public static float total_surface_area(float r, float R,
                                           float l, float h)
    {
        return pi * l * (R + r) + pi *
                    (r * r + R * R);
    }

    // Driver function
    public static void Main()
    {
        float small_radius = 3;
        float big_radius = 8;
        float slant_height = 13;
        float height = 12;

    // Printing value of volume
    // and surface area
    Console.Write("Volume Of Frustum of Cone : ");

    Console.WriteLine(volume(small_radius,
                    big_radius, height));

    Console.Write("Curved Surface Area Of" +
                     " Frustum of Cone : ");

    Console.WriteLine(curved_surface_area(small_radius,
                            big_radius, slant_height));

    Console.Write("Total Surface Area Of" +
                    " Frustum of Cone : ");

    Console.WriteLine(total_surface_area(small_radius,
                    big_radius, slant_height, height));
    }
}

// This article is contributed by vt_m
PHP
<?php
// PHP program to calculate Volume and
// Surface area of frustum of cone

// Function to calculate
// Volume of frustum of cone
function volume($r, $R, $h)
{
    $pi = 3.14159;
    return (1 / (3)) * $pi * $h *
           ($r * $r + $R * $R + $r * $R);
}

// Function to calculate Curved
// Surface area of frustum of cone
function curved_surface_area($r, $R, $l)
{
    $pi = 3.14159;
    return $pi * $l * ($R + $r);
}

// Function to calculate Total Surface
// area of  frustum of cone
function total_surface_area( $r, $R, $l, $h)
{
    $pi = 3.14159;
    return ($pi * $l * ($R + $r) +
            $pi * ($r * $r + $R * $R));
}

    // Driver Code
    $small_radius = 3;
    $big_radius = 8;
    $slant_height = 13;
    $height = 12;

    // Printing value of volume
    // and surface area
    echo("Volume Of Frustum of Cone : ");
    echo(volume($small_radius,
                $big_radius,
                $height));
    echo("\n");

    echo("Curved Surface Area Of Frustum of Cone : ");
    echo (curved_surface_area($small_radius,
                              $big_radius ,
                              $slant_height));
    echo("\n");

    echo("Total Surface Area Of Frustum of Cone : ");
    echo(total_surface_area($small_radius,
                            $big_radius,
                            $slant_height,
                            $height));

// This code is contributed by vt_m
?>

Output:

Volume Of Frustum of Cone : 1218.937
Curved Surface Area Of Frustum of Cone : 449.24738
Total Surface Area Of Frustum of Cone : 678.58344