Journey 5

A man has to make a journey of 84km in 3 hours. He travels the first 30km at 20km/hr. At what rate must he travel the remaining distance to complete his journey on time?

Correct answer:

v =  36 km/h

Step-by-step explanation:


84 - 30 = v · (3 - 30/20)

30v = 1080


v = 1080/30 = 36

v = 36

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