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Question : The speed of a boat in still water is 17 km/hr and the speed of a stream is 11 km/hr. Find the difference between the upstream speed and the downstream speed of the boat.

Option 1: 18 km/hr

Option 2: 22 km/hr

Option 3: 21 km/hr

Option 4: 28 km/hr


Team Careers360 14th Jan, 2024
Answer (1)
Team Careers360 15th Jan, 2024

Correct Answer: 22 km/hr


Solution : Given: The speed of a boat in still water is 17 km/hr and the speed of a stream is 11 km /hr.
Downstream speed of the boat = (17 + 11) = 28 km/hr
Upstream speed of the boat = (17 – 11) = 6 km/hr
So, the required difference = (28 – 6) = 22 km/hr
Hence, the correct answer is 22 km/hr.

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