Speed of stream is 4 km and the speed of boat is 11 km/hr. I

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Speed of stream is 4 km and the speed of boat is 11 km/hr. In how much time will the boot cover a distance of 21 km upstream and 45 km downstream?

[SSC CHSL 13th March 2023 Shift-1 With Answers]

A

6 hours

B

3 hours

C

4 bours

D

7 hours

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