A boat is moving 2 km against the current of the stream in 1 hour and moves 1 km in the direction of the current in 10 minutes. How long will it take the boat to go 5 km in stationary water?

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A boat is moving 2 km against the current of the stream in 1 hour and moves 1 km in the direction of the current in 10 minutes. How long will it take the boat to go 5 km in stationary water?

A1 hr 20 minutes

B1 hr 30 minutes

C1 hr 15 minutes

D30 minutes

Answer:

C. 1 hr 15 minutes

Read Explanation:

Downstream = (1/10 × 60) = 6 km/hr Upstream = 2 km/hr Speed in still water = ½ (6+2) = 4 km/hr So, the time is taken by the boat to go 5km in stationary water = 5/4 hrs = 1 ¼ hrs = 1 hr 15 minutes

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