App Logo

No.1 PSC Learning App

1M+ Downloads
A boat goes at 14 kmph along the stream and 8 kmph against the stream. The speed of the boat (in kmph) in still water is :

A12 kmph

B11 kmph

C10 kmph

D8 kmph

Answer:

B. 11 kmph

Read Explanation:

Solution:

Given:

Rate of Downstream = 14 kmph

Rate of Upstream = 8kmph

Calculation:

Speed of boat in still water = 12\frac{1}{2} (rate downstream + rate upstream)

=12(14+8)=222=11kmph=\frac{1}{2}(14+8)=\frac{22}{2}=11kmph

Speed of Boat in Still Water is 11kmph.


Related Questions:

Speed of a boat is 5 km per hour in still water and the speed of the stream is 3 km per hour. If the boat takes 3 hours to go to a place and come back, the distance of the place is :
On a river, Q is the mid-point between two points P and R on the same bank of the river. A boat can go from P to Q and back in 12 hours, and from P to R in 16 hours 40 minutes. How long would it take to go from R to P ?
A boat goes at 16 kmph along the stream and kmph against the stream. The speed of the boat (in kmph) in still water is :10
If time upstream = n × time downstream and speed in still water is 'x' and speed of stream is 'y', then find x : y.
The time taken by the boat can travel 240 km distance along the stream is equal to the time taken by the boat can travel 144 km distance against the stream. The speed of the boat is 20 km/hr. Find the speed of the stream.