Question

a rino can run at speeds about 28 miles per hour. what is that speed in feet per secsec, to the nearest whole number? (Remember there are 5280 feet in a mile, 60 seconds in a minute, and 60 minutes in a hour.)

Answer 1

Remark

You can use a method called unit analysis to solve this problem. You will use it many times in your education later on.

Solve

`(28 mile)/(hour) *(5280 feet)/(mile)*(1 hour)/(60 min)*(1 min)/(60 sec)`

Now sort out the numbers in the numerator and those in the denominator and multiply them together.

Numerator 28 * 5280 * 1 * 1 = 147840

Denominator: 60 * 60 = 3600

Now divide the numerator by denominator

Answer = 147840 / 3600 = 41.1 Feet / second

28 miles per hour = 41.1 feet / second