A boatman can row a boat downstream and upstream at 13 kmph and 9 kmph respectively. What will be the speed of the boat in still water (in kmph )? - Quantitative Aptitude MCQ Competitive Exam 2026 | ExamTest.live

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A boatman can row a boat downstream and upstream at 13 kmph and 9 kmph respectively. What will be the speed of the boat in still water (in kmph)?

Solution & Step-by-step Explanation

Let the downstream speed be v_{d} = 13 kmph and the upstream speed be v_{u} = 9 kmph . The formula for the speed of a boat in still water is: Speed in still water = \frac{v _{d} + v _{u}}{2} Speed in still water = \frac{13 + 9}{2} = \frac{22}{2} = 11 kmph

Try it yourself before checking the explanation above.

A boatman can row a boat downstream and upstream at 13 kmph and 9 kmph respectively. What will be the speed of the boat in still water (in kmph)?

12

10.5

11

10

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