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# Calculate speed, distance and time

When an object moves in a straight line at a steady speed, we can calculate its speed if we know how far it travels and how long it takes. This equation shows the relationship between speed, distance travelled and time taken:
Speed is distance divided by the time taken.
For example, a car travels 30 kilometres in 2 hours.
Its speed is 30 ÷ 2 = 15km/hr.

Formula used :

```Distance  = Speed * Time
Time = Distance / Speed
Speed = Distance / Time```

Examples:

```Input : distance(km) : 48.5  time(hr) : 2.6
Output : Speed(km / hr) : 18.653846153

Input : speed(km / hr) : 46.0  time(hr) : 3.2
Output : Distance(km) : 147.2

Input : distance(km) : 48.5  speed(km / hr) : 46.0
Output : Time(hr) : 1.0543```

## C++

 `// C++ Program to calculate speed ``// distance and time``#include``using` `namespace` `std;`` ` `// Function to calculate speed``double` `cal_speed(``double` `dist, ``double` `time``)``{``   ``cout << ``"\n Distance(km) : "` `<< dist ;``   ``cout << ``"\n Time(hr) : "` `<< ``time` `;``         ` `   ``return` `dist / ``time``;``}`` ` `// Function to calculate distance travelled``double` `cal_dis(``double` `speed, ``double` `time``)``{``   ``cout << ``"\n Time(hr) : "` `<< ``time` `;``   ``cout << ``"\n Speed(km / hr) : "` `<< speed ;``         ` `   ``return` `speed * ``time``;``}`` ` `// Function to calculate time taken``double` `cal_time(``double` `dist, ``double` `speed)``{``   ``cout << ``"\n Distance(km) : "``<< dist ;``   ``cout << ``"\n Speed(km / hr) : "` `<< speed ;``         ` `   ``return`  `dist / speed;``}`` ` `// Driver function``int` `main()``{``   ``// Calling function cal_speed()``   ``cout << ``"\n The calculated Speed(km / hr) is : "``               ``<< cal_speed(45.9, 2.0 ) << endl ; `` ` `   ``// Calling function cal_dis()``   ``cout << ``"\n The calculated Distance(km) : "``               ``<< cal_dis(62.9, 2.5) << endl ; `` ` `   ``// Calling function cal_time()``   ``cout << ``"\n The calculated Time(hr) : "` `        ``<< cal_time(48.0, 4.5) << endl ;`` ` `    ``return` `0;``}`

## Java

 `// Java Program to calculate speed ``// distance and time`` ` `class` `GFG``{``    ``// Function to calculate speed``    ``static` `double` `cal_speed(``double` `dist, ``double` `time)``    ``{``        ``System.out.print(``"\n Distance(km) : "` `+ dist) ;``        ``System.out.print(``"\n Time(hr) : "` `+ time) ;``                 ` `        ``return` `dist / time;``    ``}``     ` `    ``// Function to calculate distance travelled``    ``static` `double` `cal_dis(``double` `speed, ``double` `time)``    ``{``        ``System.out.print(``"\n Time(hr) : "` `+ time) ;``        ``System.out.print(``"\n Speed(km / hr) : "` `+ speed) ;``                 ` `        ``return` `speed * time;``    ``}``     ` `    ``// Function to calculate time taken``    ``static` `double` `cal_time(``double` `dist, ``double` `speed)``    ``{``        ``System.out.print(``"\n Distance(km) : "``+ dist) ;``        ``System.out.print(``"\n Speed(km / hr) : "` `+ speed) ;``                 ` `        ``return` `dist / speed; ``    ``}``     ` `    ``// Driver code ``    ``public` `static` `void` `main (String[] args)``    ``{``        ``// Calling function cal_speed()``        ``System.out.println(``"\n The calculated Speed(km / hr) is : "``+``                    ``cal_speed(``45.9``, ``2.0` `)); ``     ` `        ``// Calling function cal_dis()``        ``System.out.println(``"\n The calculated Distance(km) : "``+``                    ``cal_dis(``62.9``, ``2.5``)); ``         ` `        ``// Calling function cal_time()``        ``System.out.println(``"\n The calculated Time(hr) : "``+``                ``cal_time(``48.0``, ``4.5``));``    ``}``}`` ` `// This code is contributed by Anant Agarwal.`

## Python3

 `# Python3 Program to calculate speed,``# distance and time`` ` `# Function to calculate speed``def` `cal_speed(dist, time):``    ``print``(``" Distance(km) :"``, dist);``    ``print``(``" Time(hr) :"``, time);``    ``return` `dist ``/` `time;`` ` `# Function to calculate distance travelled``def` `cal_dis(speed, time):``    ``print``(``" Time(hr) :"``, time) ;``    ``print``(``" Speed(km / hr) :"``, speed);``    ``return` `speed ``*` `time;`` ` `# Function to calculate time taken``def` `cal_time(dist, speed):``    ``print``(``" Distance(km) :"``, dist);``    ``print``(``" Speed(km / hr) :"``, speed);``    ``return` `dist ``/` `speed;`` ` `# Driver Code`` ` `# Calling function cal_speed()``print``(``" The calculated Speed(km / hr) is :"``,``                     ``cal_speed(``45.9``, ``2.0` `));``print``("");`` ` `# Calling function cal_dis()``print``(``" The calculated Distance(km) :"``,``                   ``cal_dis(``62.9``, ``2.5``));``print``("");`` ` `# Calling function cal_time()``print``(``" The calculated Time(hr) :"``,``              ``cal_time(``48.0``, ``4.5``));`` ` `# This code is contributed ``# by mits`

## C#

 `// C# Program to calculate speed ``// distance and time``using` `System;`` ` `class` `GFG``{``    ``// Function to calculate speed``    ``static` `double` `cal_speed(``double` `dist, ``double` `time)``    ``{``        ``Console.WriteLine(``" Distance(km) : "` `+ dist) ;``        ``Console.WriteLine(``" Time(hr) : "` `+ time) ;``                 ` `        ``return` `dist / time;``    ``}``     ` `    ``// Function to calculate distance travelled``    ``static` `double` `cal_dis(``double` `speed, ``double` `time)``    ``{``        ``Console.WriteLine(``" Time(hr) : "` `+ time) ;``        ``Console.WriteLine(``" Speed(km / hr) : "` `+ speed) ;``                 ` `        ``return` `speed * time;``    ``}``     ` `    ``// Function to calculate time taken``    ``static` `double` `cal_time(``double` `dist, ``double` `speed)``    ``{``        ``Console.WriteLine(``" Distance(km) : "``+ dist) ;``        ``Console.WriteLine(``" Speed(km / hr) : "` `+ speed) ;``                 ` `        ``return` `dist / speed; ``    ``}``     ` `    ``// Driver code ``    ``public` `static` `void` `Main ()``    ``{``        ``// Calling function cal_speed()``    ``Console.WriteLine(``" The calculated Speed(km / hr) is : "``+``                    ``cal_speed(45.9, 2.0 )); ``     ` `        ``// Calling function cal_dis()``        ``Console.WriteLine(``" The calculated Distance(km) : "``+``                    ``cal_dis(62.9, 2.5)); ``         ` `        ``// Calling function cal_time()``        ``Console.WriteLine(``" The calculated Time(hr) : "``+``                ``cal_time(48.0, 4.5));``    ``}``}`` ` `// This code is contributed by vt_m.`

## PHP

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## Javascript

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Output

``` Distance(km) : 45.9
Time(hr) : 2
The calculated Speed(km / hr) is : 22.95

Time(hr) : 2.5
Speed(km / hr) : 62.9
The calculated Distance(km) : 157.25

Distance(km) : 48
Speed(km / hr) : 4.5
The calculated Time(hr) : 10.6667```

Time Complexity: O(1)
Auxiliary Space: O(1)

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