A motorcycle covers a distance of 72 km at a speed of 36 km/hr and a distance of 135 km/hr at a speed of 45 km/hr find the average speed of a motorcycle.
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Let D1 = 71 km
and S1 = 36 km/h
D2 = 135 km
S2 = 45 km/h
average speed = total distance traveld by an object / total time taken by an object
time = distance / speed
T1 = 72/36 = 2h
T2= 135/45 = 3h
average speed = 72 + 135 / 2 + 3
= 207/6 = 34.5 km/ h
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