0

Guest

Courses New

Two boys enter running escalator at the ground floor in a shopping mall and they do some fun on it the first boy repeatedly follows P1 = one step up and Q1 equal to two step down where as the second boy repeatedly follows P2 equal to two Step Up and Q2 equal to one step down both of them move relative to escalator with speed Vr equal to 50 cm per second if the first boy takes t 1 equal to 250 seconds and second boy takes t2 to equal to 50 seconds to reach the first floor how fast is the escalator running

Two boys enter running escalator at the ground floor in a shopping mall and they do some fun on it the first boy repeatedly follows P1 = one step up and Q1 equal to two step down where as the second boy repeatedly follows P2 equal to two Step Up and Q2 equal to one step down both of them move relative to escalator with speed Vr equal to 50 cm per second if the first boy takes t 1 equal to 250 seconds and second  boy takes t2 to equal to 50 seconds to reach the first floor how fast is the escalator running

Grade:12th pass

1 Answers

Arun
25750 Points
4 years ago
Let the speed of escalator be x.
speed*time=displacement
and displacement covered by both of them is from ground floor to first floor
therefore,
(50-x)250=(50+x)50.
12500-250x=2500+50x
-200x=-10000
x=(50cm/s)/2.
=25cm/s.
 

Think You Can Provide A Better Answer ?

Other Related Questions on IIT JEE Entrance Exam

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More