A person standing on an escalator takes time $t_1$ to reach the top of a tower when the escalator is moving. He takes time $t_2$ to reach the top of the tower when the escalator is standing . How long will he take if he walks up a moving escalator ? - Clay6.com, a Free resource for your JEE, AIPMT and Board Exam preparation

A person standing on an escalator takes time $t_1$ to reach the top of a tower when the escalator is moving. He takes time $t_2$ to reach the top of the tower when the escalator is standing . How long will he take if he walks up a moving escalator ?