1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

# A man makes a trip by automobile at an average speed of 50 km/hr. He returns over the same route at an average speed of 45 km/hr. His average speed for the entire trip is:

A
47719
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
4714
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
4712
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
471119
No worries! We‘ve got your back. Try BYJU‘S free classes today!
E
none of these
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

## The correct option is A 47719Let distance be xspeed in 1st trip =50km/hr.∴ Time taken x50hrs.speed in return trip =45km/hr∴ Time taken =x45hrs.Avg. speed =Total DistanceTotal time=x+xx/50+x/45=2x×45×5045x+50x=2×50×4595=450095=90019=47719

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
Time, Average Speed and Velocity
PHYSICS
Watch in App
Explore more
Join BYJU'S Learning Program