Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q150 (IAS/2001) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Quantitative aptitude topics Answer Verified

A person travels from X to Y a speed of 40 kmph and returns by increasing his speed by 50%. What is his average speed for both the trips ?

Result
Your answer: —  Â·  Correct: C
Explanation

The outbound speed is 40 km/h and the return speed is 50% higher, i.e., 60 km/h. For a round trip with equal distances each way, the average speed is the harmonic mean: 2ab/(a+b). Substituting a = 40 and b = 60 gives (2×40×60)/(40+60) = 4800/100 = 48 km/h. Equivalently, for distance D each way, times are D/40 and D/60, so total time = D(1/40+1/60)=D/24 and average speed = total distance/total time = 2D/(D/24) = 48 km/h, confirming the result. Therefore the correct choice is option 3 (48 kmph).

How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
41%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

IAS · 1995 · Q136 Relevance score: 1.65

A person travelled from one place to another at an average speed of 40 kilometres/hour and back to the original place at an average speed of 50 kilometres/hour. What is his average speed in kilometres/hour during the entire round-trip ?

CAPF · 2009 · Q98 Relevance score: 0.45

A person moves along a circular path by a distance equal to half the circumference in a given time. The ratio of his average speed to his average velocity is ;

CAPF · 2022 · Q32 Relevance score: -0.83

A car travels 3434th of the distance at a speed of 60 km/hr and the remaining 1414th of the distance at a speed of v km/hr. If the average speed for the full journey is 50 km/hr, then the value of v is

CAPF · 2010 · Q5 Relevance score: -1.16

Ms X drove at the speed of 45 km/hr from home to a resort. Returning over the same route she got stuck in traffic and took an hour longer, also she could drive only at the speed of 40 km/hr. How many kilometers did she drive each way ?

IAS · 2010 · Q95 Relevance score: -1.61

A person travelled a distance of 50 km in 8 hours. He covered a part of the distance on food at the rate of 4 km per hour and a part on a bicycle at the rate of 10 km per hour. How much distance did he travel on foot?