1.

A man covers a certain distance on bike. Had he moved 4 kmph faster, he would have taken 72 minutes less. If he moves slow by 4 kmph, he will take hours more to cover the distance. What is the distanc

Answer»

96 km



Let the DISTANCE be 'D' and the SPEED be 'X' kmph.
D/x + 4 = D/x - 72/60
D/x - D/(x - y) = 6/5 = D(x + 4 - x)/x(x - 4) = 6/5
∴ D/x(x + 4) = 3/10


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