# The velocity of car is 18 ms-1. Express this velocity in kmh-1.

Velocity of Car = 18 ms-1

To express this velocity in kmhr-1 we need the conversion factor which is calculated as under:

1 km = 1000 m

So, 1 m = km

Now, 1 hr = 60 minutes = 60 × 60 s = 3600 s

So, 1 s = hr

Now, Velocity of car = 18

= 18

= kmh-1

= 64.8 kmh-1

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