CLEAR
Toprankers-Info

+91 7676564400

Mobile App

Get it on Google Play
Discussions
Tags:

Articles

Discussions
Submit Discussion
Siddharth

· started a discussion

· 1 Months ago

Doubt (Question: 99474.0 )

Why the distance assumed is 300km?? Can we take any other number?

Question:
Aaditya pandit travels from Delhi to Lucknow at a speed of 100 Kmph and returns to Delhi at a speed of 50 Kmph. He again leaves for Lucknow immediately at a speed of 30 Kmph and goes back to Delhi at a speed of 60 Kmph. What is his average speed for the entire journey?
Options:
A) 54 kmph
B) 48 kmph
C) 56 kmph
D) 50 kmph
E) 60 kmph
Solution:

Let the distance between Delhi and Lucknow be 300 kms. The total time taken would be 3 + 6 + 10 + 5 = 24 hours. The total distance would be 1200 kms. Hence, the average speed is given by

Average speed = (total distance/total time) = \(\cfrac{1200}{24}\)  = 50 kmph

Hence, choice (d) is the right answer.

Mahesh

· commented

· 1 Months ago

as 300 is divisible by all i.e. 100,50,60,30
it makes the problem easy
-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