Question

For every 140 feet that Kelly rides on her bicycle, the wheels turn 20 times. About how many times do the wheels turn in 5 miles? (1 mile = 5,280 feet) Round your answer to the nearest whole number.

Answer 1

Answer: The wheels turn about 3771 times in 5 miles.

Explanation:

Given, Kelly rides on her bicycle such that the number of times wheels turn for every 140 feet = 20

Turns for every feet =
`(20)/(140)=(1)/(7)` ...(i)

To find : Number of times wheels turn in 5 miles.

Since , 1 mile = 5,280 feet

Then, 5 miles = 5 x (5,280 feet) = 26,400 feet

Now , Number of times the wheels turn in 26,400 feet = 26400 x (Turns for every feet)

`26400*(1)/(7)=3771.42857143\approx3771` [From (i)

Hence, the wheels turn about 3771 times in 5 miles.