A and B can finish a piece of work in 5 days, A and C in 10 days and B and C in 15 days. How much work will they do together in 2 days?
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a boat can travel with a speed of 22 km/hr in still water. If the speed of the river is 4 km/hr, find the following
a. Time taken to travel 104 km downstream.
b. Time taken to travel 117 km downstream and return to the same spot.
a. Time taken to travel 104 km downstream.
b. Time taken to travel 117 km downstream and return to the same spot.
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