22JUN21TUE

A cyclist covers 23 km in 3 hours. How much time will he take to cover 115 km?

23 : 3 :: 115 : x

Product of extremes = Product of middles

23*x = 3*115

x = 3*115/23

x = 3*5*23/23

x = 3*5*1

x = 15

He will take 15 hours to cover 115 km.

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