Question

A car travels at the rate of 20metre per second. Speed of car in kilometre per hour​

Answer 1

Explanation:

20 meter per sec =

$\frac{20}{1} = \frac{20 \times 60}{60} = 1200 \: mtr \: per \: min$

$\frac{1200 \times 60}{60} = 72000 \: mtr \: per \: hour$

= 72 KMPH

Answer 2

Answer:

speed =72 km/h

Explanation:

speed of car, S = 20m/s

we know,

20 m = 20 × ¹/1000 km

1 sec = ¹/(60×60) hour

then,

speed S = 20 × (3600/1000)

= 20 × 3.6

S = 72 km/h