'A' goes walks a escalator which has 30 steps and both the escalator and the A are moving and A walks only 20 steps and reaches above and now comes B who is half as fast as A ,on the same escalator
SO now tell that how many steps should B make to reach to cross the escalator ?
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'A' goes walks a escalator which has 30 steps and both the escalator and the A are moving and A walks only 20 steps and reaches above and now comes B who is half as fast as A ,on the same escalator
SO now tell that how many steps should B make to reach to cross the escalator ?
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