Bike ride

Marek rode a bike ride. In an hour, John followed him on the same route by car, at an average speed of 72 km/h, and in 20 minutes he drove him. Will he determine the length of the way that Marek took before John caught up with him, and at what speed did Marek drive?

Correct result:

s =  24 km
v =  18 km/h

Solution:


s = v • (1 + 20/60)
s = 72•(20/60)

60s-80v = 0
60s = 1440

s = 24
v = 18

Our linear equations calculator calculates it.
v=18=18 km/h



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