Question

James knows that when he walks, he takes about 120 steps per minute and that each step is 2.75 feet long. Which calculation is most reasonable for James to use to find out his walking speed in miles per hour?

Answer 1

Answer:

James can walk 3.75 miles per hour

Step-by-step explanation:

We can use conversion factors to determine the walking speed of James in miles per hour.

James takes 120 steps/minute with each step 2.75 feet long.

∴ If one step is equal to 2.75 feet then 120 steps per minute is:

= 2.75 (feet/step) × 120(steps/minute)

Where steps cancel out and you are left with:

= 330 feet/minute

1 Foot is equal to 0.00018939 miles. Therefore we can determined miles per hour as:

= (330 feet/minute) × (0.00018939miles/foot) × (60 minutes/1 hour)

Feet cancels out with the foot and minutes cancel out with minutes and you are left with:

= 3.75 miles/hour

Answer 2

Speed=120step/min=720step/h
Distance=720step/h×2.75feet/step=1980feet/h=0.375miles/h
So the answer is: he can walking 0.375miles per hour