finding distance

Question

Tenielle currently walks to school from her apartment, which is 1.2 miles away from her first class. She typically walks at a speed of 2 miles per hour. She is considering buying a used bicycle from Deseret Industries to ride to campus. Tenielle assumes that if she were riding a bike, she could go about 7 miles per hour.

 

How many minutes could Tenielle save getting to class each morning if she were to ride the bike?

(Round your answer to 2 decimal places)

Answer 1

time = distance divided by speed = miles divided by mph

t = 1.2/2 = 0.6 hours = .6(60) = 36 minutes by walking

t= 1.2/7 =about 0.1714 hours = 0.1714(60) min = about 10.29 minutes by riding the bike

she'd save 36-10.29 minutes = 25.71 minutes by riding instead of walking