Question

A car travels with a constant velocity of 45km/hr for 20 sec. What distance does it cover

Answer 1

Answer:

250 meters in 20 seconds

Explanation:

45(1000meters) = 45000meters per hour.

1hour = 60s(60) = 3600s

45000mp/h / 3600s = 12.5mp/s

12.5mp/s(20s) = 250 meters

Answer 2

Explanation:

This is simple.

Convert the speed of 45km/h to metres per second (m/s):

45 * 1000m = 45000m per hour.

1 hour = 60 seconds * 60 minutes = 3600 seconds.

45000m/h / 3600 = 12.5m/s

(A quicker way is just to divide by 3.6)

So in 20 seconds it would cover:

12.5m/s * 20s = 250m.

A car travelling at 45km/h would travel 250 metres in 20s.