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 Marek took before John caught up with him, and at what speed did Marek drive?

Correct answer:

s =  24 km
v =  18 km/h

Step-by-step explanation:

s = v · (1 + 20/60)
s = 72·(20/60)

60s-80v = 0
60s = 1440

Row 2 - Row 1 → Row 2
60s-80v = 0
80v = 1440

v = 1440/80 = 18
s = 0+80v/60 = 0+80 · 18/60 = 24

s = 24
v = 18

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

Did you find an error or inaccuracy? Feel free to write us. Thank you!

Tips for related online calculators
Do you have a linear equation or system of equations and are looking for its solution? Or do you have a quadratic equation?
Do you want to convert length units?
Do you want to convert velocity (speed) units?
Do you want to convert time units like minutes to seconds?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions: