Question

A van travelled 45 km in 45 minutes. Find its average speed in km/h.

Answer 1

First convert the speed km/h to m/s by multiplying (5/18) to the given speed

45 km/h * (5/18) = 25/2 m/s

1 minute = 60 secs ; 15 minutes = 15 * 60 = 900 secs

Distance = Speed * Time

=(25/2) * 900

=112500 meters

i.e. 11.25 kms in 15 mintues.