when Sourav increasing his speed from 20 kilometre per hour to 25 kilometre per hour, he takes 1 hour less than the usual time to cover a certain distance. what is the distance usually cover by him?
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100 km is the usual distance he cover
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Answered by
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20/25=4/5
4*25/5*20=100km
so by speed 20km per hour he need 5hour to complete 100 km and
by 25 km /hr he need 4hour to complete 100 km
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