It takes a child 90 seconds to climb the 60-meter length of an escalator which is not working. When in operation, the escalator lifts a passenger from bottom to top in 60 seconds. How many seconds does it take the child to cover the 60 meter, if she walks on the moving escalator? (A) 18 (B) 24 (C) ...

me too 123....

is there something wrong?

as the question doesn't have other conditions except XY=1,

take x=y=1, substitute and be happy!

I don't understand the verb to be used here.... should it be merges or merging My answer was E. Someone please help me understand this. the first clause in the sentence is saying what does fusion do? It powers a,b, and c. the second clause modifies this action by stating that how does it happen? by...

Although exposure to asbestos is the primary cause for mesothelioma, a slow-developing cancer, researchers believe that infection by the SV40 virus is a contributing case, since in the US 60 percent of tissue samples from mesotheliomas, but none from healthy tissue, contain SV40. SV40 is a monkey v...

Out of a total 85 children playing badminton or table tennis or both, total number or girls in the group is 70% of the total number of boys in the group. The number of boys playing only badminton is 50% of the number of boys and the total number of boys playing badminton is 60% of the total number ...

Of all the photographs taken of him at his wedding there was one that John and his friends sharply disagreed about. His friends all said that this particular picture did not much resemble him, but John said that on the contrary it was the only photograph that did. Which one of the following, if tru...

Of a group of people surveyed in a political poll, 60 percent said that they would vote for candidate R. Of those who said they would vote for R, 90 percent actually voted for R, and of those who did not say that they would vote for R, 5 percent actually voted for R. What percent of the group voted...