Question

convert 5 m/sec=--------------------kmph

Answer 1

Answer:

We know that 1000m=1km

∴1m=1/1000 km

also,1 hour=60 minutes=3600 sec

[∵1 min=60 sec and 60 min=60×60 sec=3600 sec]

∴1 sec=1/3600 h

Now, acc to question we need to convert metre into kilometre and sec into hour for which we will use above equations.

∴5m/sec=$\frac{5\frac{(1)}{1000} }{\frac{1}{3600} }$kmph

              =5×3600/1000 kmph

              ⇒18 kmph

Trick for you:

For converting from m/s to km/hr,

Multiply the equation by 18/5,

5m/sec=5×$\frac{18}{5}$=18 km/hr

Hope it helps you.