Question

· A car travels a distance of 15 km in 20 minute.
Find the speed of the car in (i) km h-1, (ii) m s-1​

Answer 1

Explanation:

45 kilometres per hour multiply 5/18 to change in m/sec

Answer 2

20 min = 20/60 hrs = 1/3 hrs

So

Speed = Distance/ Time = 15/1/3 = 15 × 3 = 45 km/h

To get speed in m/s multiply speed in km/h by 5/18

So

45× 5/18 = 75/6 = 12.5 m/s

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