Question

The speed of a moving car is 72km/hrs. Calculate its speed in m/sec.

Answer 1

Distance = Speed x Time

Given,

Speed = 72 Kmph

Time = 2 seconds

However, all the units should be similar.

As converting time of 2 seconds to Hours is not attractive to say the least, let’s convert kmph to mps

Speed = 72 *(5/18) mps = 20 mps

Distance = Speed x Time = 20 * 2 = 40 meters

Good Luck

Answer 2

$72 \times \frac{5}{18 }$

$36 \times \frac{5}{9}$

$12 \times \frac{5}{3}$

$4 \times 5$

= 20m/s