CBSE Class 9 Answered
A motorcyclist drives A to B with a uniform speed of 30 kmph and returns back with a speed of 20kmph. Find its average speed?
Asked by jshree616 | 14 Jun, 2019, 07:35: AM
Let d km be the distance between locations A and B.
Time taken to travel from A to B = (d/30) hour
Time taken to travel from B to A = (d/20) hour
average speed = Total_Distance/time = ![begin mathsize 14px style equals space fraction numerator 2 d space k m over denominator open parentheses d over 30 plus d over 20 close parentheses h r end fraction space equals space fraction numerator space space space space space 2 d space k m space space space space space over denominator begin display style fraction numerator 5 d over denominator 60 end fraction end style space h r end fraction space equals space 24 space k m divided by h r end style](https://images.topperlearning.com/topper/tinymce/cache/9e6c98777a2d24cee4b49fef4a8de66d.png)
![begin mathsize 14px style equals space fraction numerator 2 d space k m over denominator open parentheses d over 30 plus d over 20 close parentheses h r end fraction space equals space fraction numerator space space space space space 2 d space k m space space space space space over denominator begin display style fraction numerator 5 d over denominator 60 end fraction end style space h r end fraction space equals space 24 space k m divided by h r end style](https://images.topperlearning.com/topper/tinymce/cache/9e6c98777a2d24cee4b49fef4a8de66d.png)
Answered by Thiyagarajan K | 14 Jun, 2019, 08:58: AM
Application Videos
Concept Videos
CBSE 9 - Physics
Asked by nsandhyabati | 11 Jul, 2024, 21:41: PM
CBSE 9 - Physics
Asked by mintinmaurya | 25 Jun, 2024, 15:03: PM
CBSE 9 - Physics
Asked by kamakshi.tulasi | 10 Jun, 2024, 09:59: AM
CBSE 9 - Physics
Asked by nittavijayalaxmigayatri | 08 Jun, 2024, 12:36: PM
CBSE 9 - Physics
Asked by varshuparekh | 03 Jun, 2024, 18:34: PM
CBSE 9 - Physics
Asked by ashishtyagi642 | 17 May, 2024, 06:34: AM
CBSE 9 - Physics
Asked by mailtoparvathyprajith | 08 Feb, 2024, 18:45: PM
CBSE 9 - Physics
Asked by mailtoparvathyprajith | 08 Feb, 2024, 12:32: PM
CBSE 9 - Physics
Asked by mailtoparvathyprajith | 08 Feb, 2024, 12:13: PM
CBSE 9 - Physics
Asked by mailtoparvathyprajith | 06 Feb, 2024, 21:50: PM