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A man rows a boat 18 km in 4 hours downstream and returns upstream in 12 hours, the speed of the stream in km/hr is

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a
1
b
1.5
c
2
d
1.75

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detailed solution

Correct option is B

Rate downstream =184=92kmph

Rate upstream =1812=32kmph

Speed of stream =92322

=934

=64

=32

=1.5kmph

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