Question
A bus covers 216 km in 3 hours. The bike’s speed is 6
m/s less than the bus. How far (in metres) does the bike travel in 4 minutes 15 seconds?Solution
ATQ, Speed of bus = (216/3) = 72 km/h = 72 × (5/18) = 20 m/s Speed of bike = 20 − 6 = 14 m/s 4 minutes 15 seconds = 4 × 60 + 15 = 255 seconds Required distance = 14 × 255 = 3,570 metres
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