What is the downstream speed of a boat when the speed of the boat in still water is 10 m/s and the speed of the river is 20% of the speed of the boat?

Challenger App

No.1 PSC Learning App

★

★

★

★

★

1M+ Downloads

What is the downstream speed of a boat when the speed of the boat in still water is 10 m/s and the speed of the river is 20% of the speed of the boat?

A8 m/s

B12 m/s

C4 m/s

D9 m/s

Answer:

B. 12 m/s

Read Explanation:

The speed of the boat in still water = 10 m/s The speed of the river = 20% of 10 m/s = 2 m/s ⇒ Downstream speed = (10 + 2) = 12 m/s

Read more in App

Related Questions:

In one hour, a boat goes 13 km/hr in the direction of the stream and 7 km/hr against the direction of the stream. What will be the speed of the boat in still water?

A man can row 40 kmph in still water and the river is running at 10 kmph. If the man takes 2 hr to row to a place and back, how far is the place?

A boat covers 12 km upstream and 18 km downstream in 3 hours, while it covers 36 km up- stream and 24 km downstream in 6 $\frac{1}{2}$ hours. What is the speed of the current ?

A boat goes 12 km downstream and comes back to the starting point in 3 hours. If the speed of the current is 3 km/hr, then the speed (in km/hr) of the boat in still water is

A boat goes 6 km an hour in still water, but takes thrice as much time in going the same distance against the current. The speed of the current (in km/hour) is :