a laddder has 10 steps. a labourour has to carry some weight to the top . He climbs the ladder 2 steps up in one second and 1 step down in the next second by dancing on a famous tune, In how many seconds would he reach the top ???????????????????????
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He climbs the ladder 2 steps up in one second and 1 step d… ... by dancing on a famous tune. In how many seconds he would reach the top. 1 ... he get down in next 2 sec = 1 step .
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labour goes in 1 sec = 2 steps then, he get down in next 2 sec = 1 step .so, finally he goes up in 1 step in = 3sec .hence , he goes 10 steps in = 3×10 ...
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in 9 seconds he reached the top.
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