UPSC CDS Math Speed, Time and Distance Questions

Question : 12 of 53

Marks: +1, -0

A car has an average speed of 60 km per hour while going fi'om Delhi to Agra and has an average speed of y km per hour while returning to Delhi fi'om 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 ?