wiz-icon
MyQuestionIcon
MyQuestionIcon
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 47719
Let distance be x
speed 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

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Time, Average Speed and Velocity
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon