A car has an average speed of 60 km per hour while going fro

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CDS-I 2018 Elementary Maths(PYSP)
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MATH

48

M: +1.00/-0.33

A car has an average speed of 60 km per hour while going from Delhi to Agra and has an average speed of y km per hour while returning to Delhi from Agra (by travelling the same distance). If the average speed of the car for the whole journey is 48 km per hour, then what is the value of y?

[CDS-I 2018 Elementary Maths(PYSP)]

A 30 km per hour

B 35 km per hour

C 40 km per hour

D 45 km per hour