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2014-10-24T05:43:24+05:30

This Is a Certified Answer

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Let the distance between town and house be X km. 

TIme taken to reach the town :  X/40 hours
Time taken to come back home  : X/60 hours

Total time of travel : X(3+2)/120  = X/24 hours

Average speed = Total distance / total time = 2 X / (X/24) = 48 kmph 

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2014-10-24T09:33:35+05:30

This Is a Certified Answer

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Let the distance between house and town be x 
so time taken to go to town = x/40
and time taken to reach home = x/60 
Total distance = x+  x = 2x
So average velocity is distance/time
                            
\frac{2X}{\frac{X}{40}+\frac{X}{60}}

= 48 kmhr⁻¹
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