Question

A journey by car takes 48 minutes at 65 kmph. How fast the car must go to finish the journey in 40 minutes?

Answer 1

T = 48 min
S = 65 km/h
D = SxT
    =  65 x 48/60
     52 km

New time = 40 min
New speed = D/time
                  = D x 1/t
                  = 52 x 60/40
                  = 78 km/h

Answer 2

Step-by-step explanation:

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