Problema Solution
Julia can finish a 20-mile bike ride in 1.2 hours. Katie can finish the same bike ride in 1.6 hours. How much faster does Julia ride than Katie?
Answer provided by our tutors
Julia's speed = 20/1.2 in miles per hour
Katie's speed = 20/1.6 in miles per hour
Since Julia is faster, we subtract her speed from Katie's to determine how much faster Julia rides:
(20/1.2) - (20/1.6)
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4.1666
So Julia is approximately 4.2 miles per hour