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22(3/5) = 113/5 14(1/8) = 113/8 Let total work = 1 unit So, efficiency of 'A' = (5/113) units/day Efficiency of 'B' = (8/113) units/day So, combined efficiency of 'A' and 'B 5/113 + 8/113 = 13/113 units/day So, time taken by 'A' and 'B' together to finish the work = (113/13) = 8(9/13) days
A man rows upstream 10 km and downstream 15 km taking 5 hours each. Find the man’s speed in still water.
...A man can row at 36 km/hr in still water. In a stream which is flowing at 12 km/hr, it takes him 3 hrs to a place and back. How far is the place?
A man can row at 6 kmph in still water. If the velocity of current is 3 kmph and it takes him 8 hour to row to a place and come back, how far is the place?
