When Sourav increases his speed from 20 Km hr to 25 Km hr he takes one hour less than the usual time...........

Quant (SSC) Time & distance

When Sourav increases his speed from 20 Km/hr to 25 Km/hr, he takes one hour less than the usual time to cover a certain distance. What is the distance usually covered by him?

125 km

100 km

80 km

120 km

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Explanation:

Here, the distance travelled by Sourav is constant in both the cases.
So,20 * t = 25 * (t-1) = D
=> 20t = 25t - 25
=> 5t = 25
=> t = 5 hrs So, Distance travelled = 20 * 5 = 100 Km.

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