Total time taken by a boat in travelling from X to Y and Y to X is 2 hours. the speed of the boat in still water is 12 kmph and the distance between X to Y is 9 kms. What is the speed of the current?
A. 5 khph
B. 4 kmph
C. 2 kmph
D. 1 kmph
E. 7 kmph
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Answer: 6 km/ph
(9/12-y) + (9/12+y) = 2 hr
Y=6
I don't know frnds plz explain us