1. 

A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.

A. 2 hours
B.

तीन घंटे

C.

चार घंटे

D.

पांच घंटे


2. 

A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?

A. 2 : 1
B.

3: 2

C.

8: 3

D.

तय नहीं किया जा सकता


3. 

A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is:

A. 4
B.

5

C.

6

D.

10


4. 

In one hour, a boat goes 11 km/hr along the stream and 5 km/hr against the stream. The speed of the boat in still water (in km/hr) is:

A. 3 km/hr
B.

5 किमी / घंटा

C.

8 किमी / घंटा

D.

9 किमी / घंटा


5. 

A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is:

A. 8.5 km/hr
B.

9 किमी / घंटा

C.

10 किमी / घंटा

D.

12.5 किमी / घंटा