LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
15 views
in Aptitude by (30.0k points)
closed by
A man travels a certain distance at a speed of 40 kmph and returns by increasing his speed by 50%. What is his average speed for the whole journey?
1. 50 kmph
2. 46 kmph
3. 48 kmph
4. 52 kmph

1 Answer

0 votes
by (53.7k points)
selected by
 
Best answer
Correct Answer - Option 3 : 48 kmph

Given 

Speed of train in starting = 40 km/hr 

Formula Used 

Average speed = 2 × S1 × S2/(S1 + S2)

Calculation 

Speed of return journey = 40 + 40 × 50/100 = 60 km/hr

Average speed = 2 × 40 × 60/100 = 48 km/hr

∴ The average speed of man is 48 km/hr 

This formula is used only when the distance covered is same for both cases. 

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...