Question

A bus takes 30 minutes to cover a distance of 18 kilometers. Calculate its speed in (a) kmh-1

and

(b) ms-1

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Answer 1

Time = 30min = 30/60= 1/2 hr

Distance = 18km

Speed = distance/ time

=> 18/1/2 = 18*2/1

=> 36 km/hr

speed in km/sec

Time = 30min = 30*60 = 1800sec

Distance = 18km

Speed = distance/time

=> 18/ 1800

=> 1/100 km/sec or

0.01 km/sec