The speed of a stream is 3 km/h and the speed of a man in still water is 5 km/h. The time taken by the man to swim 26 km downstream is:

Correct option is D

Given:

Speed of the man in still water = 5 km/h

Speed of the stream = 3 km/h

Distance to swim downstream = 26 km

Concept Used:

Downstream Speed=Man’s speed + Stream speed

Time $$= \frac{\text{Distance}}{\text{Speed}}$$​

Solution:

Downstream speed=5 + 3 = 8 km/h

Time=$$\frac{26}{8} = 3.25 \text{ hours} = 3 \text{ hours } 15 \text{ minutes}$$ 

= 3$$\frac 14$$ hours​