# Percentage increase in the cylinder if the height is increased by given percentage but radius remains constant

• Last Updated : 22 Mar, 2021

Given here is a right circular cylinder, whose height increases by a given percentage, but radius remains constant. The task is to find the percentage increase in the volume of the cylinder.
Examples:

```Input: x = 10
Output: 10%

Input: x = 18.5
Output: 18.5%```

Approach

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• Let, the radius of the cylinder = r
• height of the cylinder = h
• given percentage increase = x%
• so, old volume = π*r^2*h
• new height = h + hx/100
• new volume = π*r^2*(h + hx/100)
• so, increase in volume = πr^2*(hx/100)
• so percentage increase in volume = (πr^2*(hx/100))/(πr^2*(hx/100))*100 = x ## C++

 `// C++ program to find percentage increase``// in the cylinder if the height``// is increased by given percentage``// but radius remains constant` `#include ``using` `namespace` `std;` `void` `newvol(``double` `x)``{``    ``cout << ``"percentage increase "``         ``<< ``"in the volume of the cylinder is "``         ``<< x << ``"%"` `<< endl;``}` `// Driver code``int` `main()``{``    ``double` `x = 10;``    ``newvol(x);``    ``return` `0;``}`

## Java

 `// Java program to find percentage increase``// in the cylinder if the height``// is increased by given percentage``// but radius remains constant``import` `java.io.*;` `class` `GFG``{` `static` `void` `newvol(``double` `x)``{``    ``System.out.print( ``"percentage increase "``        ``+ ``"in the volume of the cylinder is "``        ``+ x + ``"%"` `);``}` `// Driver code``public` `static` `void` `main (String[] args)``{``    ``double` `x = ``10``;``    ``newvol(x);``}``}` `// This code is contributed by anuj_67..`

## Python3

 `# Python3 program to find percentage increase``# in the cylinder if the height``# is increased by given percentage``# but radius remains constant` `def` `newvol(x):``    ``print``(``"percentage increase in the volume of the cylinder is "``,x,``"%"``)` `# Driver code``x ``=` `10.0``newvol(x)` `# This code is contributed by mohit kumar 29`

## C#

 `// C# program to find percentage increase``// in the cylinder if the height``// is increased by given percentage``// but radius remains constant``using` `System;` `class` `GFG``{` `static` `void` `newvol(``double` `x)``{``    ``Console.WriteLine( ``"percentage increase "``        ``+ ``"in the volume of the cylinder is "``        ``+ x + ``"%"` `);``}` `// Driver code``public` `static` `void` `Main ()``{``    ``double` `x = 10;``    ``newvol(x);``}``}` `// This code is contributed by anuj_67..`

## Javascript

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Output:

`percentage increase in the volume of the cylinder is 10.0%`

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