Question

A boat can cover 145 km in downstream in 5 hours and 144 km in upstream in 8 hours. Find the speed of boat in still water.

A 5.9 km/hr Correct Answer Incorrect Answer
B 7.9 km/hr Correct Answer Incorrect Answer
C 6.9 km/hr Correct Answer Incorrect Answer
D 8.9 km/hr Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

Downstream speed of the boat = 145/5 = 29 km/hr upstream speed of the boat = 144/8= 18 km/hr Speed of boat in still water = (29 + 18)/2 = 23.5 km/hr

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