CLEAR
Toprankers-Info

+91 7676564400

Mobile App

Get it on Google Play
Discussions
Select Date
Tags:

Articles

Discussions
Submit Discussion
BLESSY

· started a discussion

· 1 Months ago

B (Question: 108789.0 )

Did not understand the calculation.

Kindly explain.

Question:

The length of the second train is 25% more than that of the first train and their speeds are 86 km/hr. and 50 km/hr. respectively. They are runing in the same 

direction and the train with higher speed, crosses the train of lower speed in 36 seconds. What is the length of each train?

Options:
A) 160 mtr.,  200 mtr.
B) 100 mtr., 125 mtr.
C) 200 mtr., 250 mtr.
D) 100 mtr., 150 mtr.
Solution:
Ans: (a) Let the length of the first train be ‘l’ meter, then the length of the second train be 1.25 l meter.

Equivalent speed = 36 km/hr = 10 m/sec.

Total length = 2.25 l meter

A.T.Q.,

\(\cfrac{2.25\ l}{10}=36\Rightarrow l=\cfrac{360}{2.25}=160\) meter.

Thus, the length of the second train = 200 meter.

Knowledge Expert

· commented

· 1 Months ago

Dear Student,
l=36000/225 = 160 meter = first train's length
Second train's length = 1.25 l = 1.25 * 160 = 200 meter
Keep Learning with Us
Best Wishes
Team Toprankers
-logo
We at aim to provide most comprehensive content & test for practice which is carefully divided into various chapters and topics to help you focus on your weak areas.Our Practice mock test gives you unmatched analytics to help you realize your strong areas,time management and improvement areas.Our Short & Crisp notes on each topic will help you to quickly revise the topic along with the tips & tricks of the exams.
More About
-Info
-Info

Mobile App

Get it on Google Play
About Us Campus Ambassador Careers Contact Us Refund Policy

All Rights Reserved Top Rankers

User Policy
Disclaimer
Terms & Conditions