Question

A model airplane flies 18 feet in 2 seconds. what is the airplane's speed in miles per hour? round your answer to nearest hundredth.

Answer 1

1 hour = 60 * 60 = 3,600 seconds

Solve this proportion.

18/2 = x/3,600

https://www.mathsisfun.com/algebra/proportions.html

Answer 2

0.0025

Answer 3

18 ft/ 2 sec

= (18/5280) miles / (2/3600) hrs
= (18/5280)(3600/2) mph
= appr 6.14 mph

Answer 4

126

Answer 5

approx 16.4 mph