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Subject :NSO    Class : Class 8

A body goes from point X to point Y with a speed of 10 m s-1. It comes back to X with a speed of 20 m s-1. The average speed of the body during the journey is ______.

A15 m s-1
B16.6 m s-1
C13.3 m s-1
D30 m s-1

Hi, I am a bit confused about this question... How could the answer possibly be 'C'? The answer is most obviously A... Please comment.

Ans 1:

Class : Class 6

Ans 2:

Class : Class 8
It's supposed to be A, right?

Ans 3:

Class : Class 8
I thought it was a

Ans 4:

Class : Class 9
shoulda be option A average of 10 and 20 is 15, NOT 13.3

Ans 5:

Class : Class 3

Ans 6:

Class : Class 4

Ans 7:

Class : Class 8
It should be A

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