Question
Travelling at his usual speed, a man reaches his
destination in 20 hours. If he reduces his speed by (1/12) , then he covers 100 km less in the same time. Find the usual speed of the man.Solution
ATQ, Let the usual speed be 12x km/h. The reduced speed = (11/12) × 12x = 11x km/h Using the formula Distance = Speed × Time, 
Usual speed = 12x = 60 km/h.
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