A motorboat goes 24 km in 2 hours along the stream and 10 km in 1 hour against the stream. Find the speed of the motorboat in kmph.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 11.
| Understanding/Application |
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Speed of motorboat = x speed of stream = y 2x + 2y = 24 x + y = 12 .....(1 x - y = 10 .....(2 |
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Adding eq. (1 and (2 - 2x = 22 x = 22/2 x = 11 km/hr |