Question

John takes one step every second, and each step is 33 inches long. How many miles per hour is John walking, given that 5280 feet = 1 mile? Express your answer as a decimal to the nearest thousandth.

Answer 1

1.875 a hour

Explanation:

It is this way because 33/12 is 2.75 so he is walking 2.75 feet a second

Multiply the second by 3600 and the 2.75 feet by 3600 and you get 9900

per hour divide 9900 by 5280 and you get 1.875

Answer 2

`Speed = 1.875 miles/hour`

Explanation:

Given

`Speed = 33in/s`

Required

Convert to mile/hour

`1\ inch = 1/63360\ mile`

`1\sec = 1/3600\ hr`

So:

`Speed = 33in/s`

`Speed = (33 * 1/63360)/(1/3600)`

`Speed = (33/63360)/(1/3600)`

`Speed = (33)/(63360)/(1)/(3600)`

`Speed = (33)/(63360) * (3600)/(1)`

`Speed = (33 * 3600)/(63360)`

`Speed = (118800)/(63360)`

`Speed = 1.875 miles/hour`

Hence, John is working at 1875 miles per hour