Question

The velocity of a car is 18 metre per second. Express it in km per hour.

Answer 1

1080 per hour answer

Answer 2

for changing it multiply it by 18÷5
therefore 18*(18÷5) = 64.8

therefore your answer is 64.8 km/h

P.S. if you want to change km/h to m/s multiply the value by (5÷18)