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

Answer:

$Speed = 1.875 miles/hour$

Step-by-step explanation:

Given

$Speed = 33in/s$

Required

Convert to mile/hour

$1\ inch = 1/63360\ mile$

$1\sec = 1/3600\ hr$

So:

$Speed = 33in/s$

$Speed = \frac{33 * 1/63360}{1/3600}$

$Speed = \frac{33/63360}{1/3600}$

$Speed = \frac{33}{63360}/\frac{1}{3600}$

$Speed = \frac{33}{63360} * \frac{3600}{1}$

$Speed = \frac{33 * 3600}{63360}$

$Speed = \frac{118800}{63360}$

$Speed = 1.875 miles/hour$

Hence, John is working at 1875 miles per hour