Question

Lesson 2 Practice Problems

1. A cyclist rode 3.75 miles in 0.3 hours.
a. How fast was she going in miles per hour?
b. At that rate, how long will it take her to go 4.5 miles?

Answer 1

.08 miles per minute

Explanation:

she would have to go 18mph

Answer 2

• a) 12.5 mph,
• b) 0.36 hours or 21.6 min.

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Given

• Distance = 3.75 miles,
• Time = 0.3 hours.

a)

• speed = distance/time
• s = 3.75/0.3
• s = 12.5 mph

b)

• Speed = 12.5 mph,
• Distance = 4.5 miles.

• time = distance/speed

• t = 4.5/12.5
• t = 0.36 hours
• t = 0.36*60 min
• t = 21.6 min