Question

Raju takes twice as long to row upstream as to row downstream in a river. If the river flows at 5 km/h, then find the speed of Raju in still water.

Options

• 15 km/h

• 19 km/h

• 13 km/h

• 17 km/h

Answer 1

15 km/h

Explanation:

Let, speed of Raju is `x` km/hr

Distance = D km

A.T.Q,

`2 xx D/(x + 5) = D/((x - 5))`

⇒ `2(x - 5) = x + 5`

⇒ `x` = 15

∴ `x` = 15 km/hr