Q3.6Multiple choice
At a metro station, a girl walks up a stationary escalator in time t1. If she remains stationary on the escalator, then the escalator take Motion in a Straight Line her up in time t2. The time taken by her to walk up on the moving escalator will be
- (a)(t1 + t2)/2
- (b)t1t2/(t2–t1)
- (c)t1t2/(t2+t1)
- (d)t1–t2