1.

a boat has a speed of 5 kmph in still water. it crosses a river of width 1km along the shortest possible path in 15 min. the velocity of river is​

Answer»

Explanation:

LET the speed of RIVER be x KMPH

(5-x) × 1/4 =1

5-x =4

x = 5-4

= 1 kmph



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