Question

how is the kmh is converted into meter per secound

Answer 1

$\large{\underline{\underline{\red{\sf{How\:to\:convert\:km/hr\:into\:m/s?}}}}}$

We know that :-

• 1 kilometer = 1000m
• 1 hour = 60 min
• 1 min = 60 seconds.

Now if we wish to convert km/hr into m/s , then ;

Let us take 1km/hr . So ,

➥ 1km/hr

➥ 1 × 1000m / 1 × 60 min.

➥ 1000m / 60 × 60 s.

➥ 1000m / 3600s .

➥ 5/18 m/s .

Now here we see that 1km/hr = 5/18 m/s .

So if any speed is given in km/hr , then we can just multiply it by 5/18 in order to obtain 10 speed in m/s .

Similarly if we want to convert metre per second into kilometre per hour then we can multiply it by 18/5 .

Here are some examples :-

1)Convert 54 km/hr into m/s .

Ans We know that 1km/hr = 5/18 m/s .

So, 54km/hr = 54×5/18 m/s = 15m/s.

2) Convert 20km/hr into m/s.

Ans We know that 1km/hr =5/18 m/s. So 20km/hr = 20×5/18 m/s = 5.5m/s .

3) Convert 72km/hr into m/s .

Ans We know 1km/hr = 5/18m/s . So , 72km/hr = 72 ×5/18 m/s = 20m/s .

4) Convert 15m/s into km/hr .

Ans We know 1m/s = 18/5 km/hr .So 15km/hr = 15 × 18 / 5 m/s = 54km/hr.

5) Convert 25m/s into km/hr .

Ans We know 1m/s = 18/5 km/hr . So , 25m/s = 25 × 18/5 km/hr = 90km/hr.