AIEEE Exam

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 her up in
time t2. The time taken by her to walk up on the
moving escalator will be

Read Solution (Total 1)

t1=d/v1
t2=d/v2
now both moving so speed v1+v2
t=d/(v1+v2)
t=d/(d/t1+d/t2)
t=1/(1/t1+1/t2)
t=t1*t2/(t1+t2)
3 years agoHelpfull: Yes(0) No(0)

AIEEE Other Question

A block is placed on a surface with vertical cross
section given by the equation y = x^2/20
. If the
coefficient of friction is 0.5, the maximum height
above the ground at which a block can be placed
without slipping is -
(A) 1.00 m (B) 1.25 m
(C) 1.50 m (D) 1.90 m
For a cell reaction to be spontaneous, –
(A) Ecell and ∆G should be positive
(B) Ecell and ∆G should be negative
(C) Ecell should be +ve and ∆G should be –ve
(D) Ecell = 0 and ∆G should be –ve