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27 June, 08:07

Diane averages 10 mph riding her

bike to work. Averaging 40 mph

on the way back home by car, she

takes hour less time.

How far does she travel

to work?

+2
Answers (1)
  1. 27 June, 08:21
    0
    20 miles

    Step-by-step explanation:

    d miles * (1 h) / (10 miles) = d/10 hours

    d miles * (1 h) / (40 miles) = d/40 hours

    d/40 = d/10 - 3/2

    d = 4d - 60

    d = 20 miles
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