A man can walk up a moving "up" escalator in 30 seconds. The same man can walk down this moving "up" escalator in 90 seconds. Assume that his walking speed is same upwards and downwards. How much time will he take to walk up the escalator, when it is not moving?

30 sec

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45 sec

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60 sec

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90 sec

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Solution

The correct option is B 45 sec
Distance = d
Escalator speed = x
Person speed = y
d = (y-x)90 = (x+y)30
The person took 30 sec with a speed of 3x and he will take 45 sec with a speed of 2x.

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A man can walk up a moving "up" escalator in 30 seconds. The same man can walk down this moving "up" escalator in 90 seconds. Assume that his walking speed is same upwards and downwards. How much time will he take to walk up the escalator, when it is not moving?

The correct option is B 45 secDistance = d Escalator speed = x Person speed = y d = (y-x)90 = (x+y)30 The person took 30 sec with a speed of 3x and he will take 45 sec with a speed of 2x.

The correct option is B 45 sec
Distance = d
Escalator speed = x
Person speed = y
d = (y-x)90 = (x+y)30
The person took 30 sec with a speed of 3x and he will take 45 sec with a speed of 2x.