Question
The downstream speed of a boat is 75% greater than its
upstream speed, and the speed of the stream is 3 m/s. How far can the boat travel in still water in 7.5 hours?Solution
Let the speed of boat in still water is y m/sec Then according to question (y+3) = 175% of (y-3) 4y+12 = 7y-21 3y = 33 Y = 11 m/sec Y = 11×18/5 km/hrs. = 198/5 km/hrs. boat can cover the distance in still water in 7.5 hours = 198/5 ×7.5 = 297 km
Four of the following five are alike in a certain way and thus form a group as per the given arrangement. Which of the following one does not belong to ...
Four of the following five are alike in a certain way and hence form a group. Find the one that doesn’t belong to that group.
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X has tuition centre in which place?  Â
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Six persons L, M, N, O, P and Q sit in a row facing north. Q sits third to the left of P. One person sits between N and P. O sits immediate left of M. N...
How many persons sit between S and R?
i) Who is sitting in the second place on the left side of the Dani, Chintu is sitting at the fourth place on the right side.
ii) There are three ...
Who among the following does like Purple?
Who among the following likes Brown?Â
