# Program to convert speed in km/hr to m/sec and vice versa

Convert speed given in km/hr to m/sec and vice versa .

Examples:

```Input : kmph = 72, mps = 10
Output : speed_in_mps = 20
speed_in_kmph = 36

Input : kmph = 54, mps = 15
Output : speed_in_mps = 15
speed_in_kmph = 54
```

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Approach:
1 km = 1000 m and 1 hr = 3600 sec (60 min x 60 sec each).

Conversion from Km/h to m/sec-
When converting km/hr to m/sec, multiply the speed with 1000 and divide the result with 3600.

`1 km/hr = 5/18 m/sec or 0.277778 m/sec `

Conversion from m/sec to km/h-
When Converting m/sec to km/hr, divide the speed with 1000 and multiply the result with 3600.

`1 m/sec = 18/5 km/hr or 3.6 km/hr`

Below is the program implementation:

## C++

 `// CPP program to convert   ` `// kmph to mps and vice versa ` `#include ` `using` `namespace` `std; ` ` `  `// function to convert speed ` `// in km/hr to m/sec ` `float` `kmph_to_mps(``float` `kmph) ` `{ ` `    ``return` `(0.277778 * kmph); ` `} ` ` `  `// function to convert speed ` `// in m/sec to km/hr ` `float` `mps_to_kmph(``float` `mps) ` `{ ` `    ``return` `(3.6 * mps); ` `} ` ` `  `// driver function ` `int` `main() ` `{ ` `    ``// variable to store ` `    ``// speed in kmph ` `    ``float` `kmph = 72.0; ` `     `  `    ``// variable to store ` `    ``// speed in mps ` `    ``float` `mps = 10.0; ` `     `  `    ``cout << ``"speed_in_mps = "` `<< kmph_to_mps(kmph)  ` `         ``<< ``" speed_in_kmph = "` `<< mps_to_kmph(mps); ` `          `  `    ``return` `0; ` `} `

## Java

 `// Java program to convert  ` `// kmph to mps and vice versa ` `import` `java.io.*; ` ` `  `class` `GFG  ` `{ ` `    ``// function to convert speed ` `    ``// in km/hr to m/sec ` `    ``static` `int` `kmph_to_mps(``double` `kmph) ` `    ``{ ` `        ``return``(``int``) (``0.277778` `* kmph); ` `    ``} ` `     `  `    ``// function to convert speed ` `    ``// in m/sec to km/hr ` `    ``static` `int` `mps_to_kmph(``double` `mps) ` `    ``{ ` `        ``return``(``int``) (``3.6` `* mps); ` `    ``} ` `     `  `    ``// Driver function ` `    ``public` `static` `void` `main (String[] args)  ` `    ``{ ` `        ``// variable to store ` `        ``// speed in kmph ` `        ``double` `kmph = ``72.0``; ` `         `  `        ``// variable to store ` `        ``// speed in mps ` `        ``double` `mps = ``10.0``; ` `         `  `        ``System.out.println(``"speed_in_mps = "` `+ kmph_to_mps(kmph)  ` `                          ``+ ``" speed_in_kmph = "` `+mps_to_kmph(mps)); ` `     `  `    ``} ` `} ` ` `  `// This code is contributed by vt_m. `

## Python3

 `  `  `# Python3 program to convert  ` `# kmph to mps and vice versa ` ` `  `# Function to convert speed ` `# in km/hr to m/sec ` `def` `kmph_to_mps(kmph): ` ` `  `    ``return` `(``0.277778` `*` `kmph) ` ` `  `# Function to convert speed ` `# in m/sec to km/hr ` `def` `mps_to_kmph(mps): ` ` `  `    ``return` `(``3.6` `*` `mps) ` ` `  `# Driver Code ` ` `  `# variable to store ` `# speed in kmph ` `kmph ``=` `72.0` `     `  `# variable to store ` `# speed in mps ` `mps ``=` `10.0` `     `  `print``(``"speed_in_mps = "``, ``int``(kmph_to_mps(kmph)) , ` `      ``" speed_in_kmph = "``, ``int``(mps_to_kmph(mps))) ` `         `  `# This code is contributed by Anant Agarwal. `

## C#

 `// C# program to convert ` `// kmph to mps and vice versa ` `using` `System; ` ` `  `class` `GFG { ` `     `  `    ``// function to convert speed ` `    ``// in km/hr to m/sec ` `    ``static` `int` `kmph_to_mps(``double` `kmph) ` `    ``{ ` `        ``return` `(``int``)(0.277778 * kmph); ` `    ``} ` ` `  `    ``// function to convert speed ` `    ``// in m/sec to km/hr ` `    ``static` `int` `mps_to_kmph(``double` `mps) ` `    ``{ ` `        ``return` `(``int``)(3.6 * mps); ` `    ``} ` ` `  `    ``// Driver function ` `    ``public` `static` `void` `Main() ` `    ``{ ` `        ``// variable to store ` `        ``// speed in kmph ` `        ``double` `kmph = 72.0; ` ` `  `        ``// variable to store ` `        ``// speed in mps ` `        ``double` `mps = 10.0; ` ` `  `        ``Console.WriteLine(``"speed_in_mps = "` `+ kmph_to_mps(kmph) + ` `                        ``" speed_in_kmph = "` `+ mps_to_kmph(mps)); ` `    ``} ` `} ` ` `  `// This code is contributed by vt_m. `

## PHP

 ` `

Output:

```speed_in_mps = 20 speed_in_kmph = 36
```

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