In still water, the speed of a motorboat is 15 km/h. The boa

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In still water, the speed of a motorboat is 15 km/h. The boat travels 30 km downstream and returns in 4 hours and 30 minutes. The stream's speed (in km/h) is:

[SSC CHSL 31st May 2022 Shift-2 With Answers]

A

4

B

7

C

5

D

3

EXPLANATION

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