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A boy at the airport takes time t1 to wa...

A boy at the airport takes time `t_1` to walk on escalator if the escalator is at rest and takes time `t_2` if boy is at rest on moving escalator.Then find the time taken to walk on the escalator for same path?

A

`|t_1-t_2|`

B

`(t_1+t_2)/2`

C

`(2t_1t_2)/(t_1+t_2)`

D

`(t_1t_2)/(t_1+t_2)`

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JEE MAINS PREVIOUS YEAR-JEE MAIN 2021-PHYSICS SECTION B
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