Question
A person completes a journey in 300 minutes by train at a
speed of 60 km/h. What should be his speed by bus to cover the same distance in 7 hours?Solution
ATQ,
When distance is constant,
Time ∝ 1/Speed
7 hours = 7 × 60 = 420 minutes
(Speed of train) ÷ (Speed of bus) = 420 ÷ 300 = 7:5
Speed of bus = (5/7) × 60 = 42.86 km/h
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