3 years ago

Diane averages 10 mph riding her

Mathematics

1 answer:

aksik [14]3 years ago

4 0

Answer:

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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