A boat which has a speed of 6km/h in still water crosses a river of width 1 km along the shortest possible path in 20 min. the velocity of the river w

Question

A boat which has a speed of 6km/h in still water crosses a river of width 1 km along the shortest possible path in 20 min. the velocity of the river w

A boat which has a speed of 6km/h in still water crosses a river of width 1 km along the shortest possible path in 20 min. the velocity of the river water in km/h is
A. 1
B. 3
C. 4
D. `3sqrt(3)`

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - D
t=20cm `=(1)/(3)` hr
`1km=sqrt((6)^(2)-V^(2))xx((1)/(3)hr)`
`V=3sqrt(3)km//hr`.

4 views Answered 2023-02-05 15:29