A boy reaches the airport and finds... | Relative Motion

JEE MAIN 2021

20-07-21 S2

Question

A boy reaches the airport and finds that the escalator is not working. He walks up the stationary escalator in time $t_1$. If he remains stationary on a moving escalator then the escalator takes him up in time $t_2$. The time taken by him to walk up on the moving escalator will be :

Select the correct option:

$\frac{t_1 t_2}{t_2-t_1}$

$\frac{t_1+t_2}{2}$

$\frac{t_1 t_2}{t_2+t_1}$

$\mathrm{t}_2-\mathrm{t}_1$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution