Question

Speed of a bus is 20 m/sec. Calculated its speed in km/h​

Answer 1

Answer:

72km /hr

Explanation:

20m / 1 sec

Multiply and divide by 3600 (as 1 hr = 60 × 60 sec)

20 × 3600 / 1 ×3600

= 72000 m / 1hr

= 72 km /hr.

Hope my answer helps..

Answer 2

Answer:

{1 kilometre = 1000 meter}

=> 1m = 10-³km

1 hour = 3600s

1s= 1/3600m

M/S =1m /1s

=(10-3km/1/3600"h)

=3600/1000km/h=3.6km/hours

=18/5km/h

: the speed of a moving car =20m/s

20×18/5km/h

=72km/h