Assume the average growth rate of human hair is 0.575 inches in 1 month. How much does it grow each second? Assume an average of 30 days per month.

Question

Assume the average growth rate of human hair is 0.575 inches in 1 month. How much does it grow each second? Assume an average of 30 days per month.

= ? in/s

Answer 1

This question asks you to convert between units.

Our goal is to convert 0.575 in/month to x in/s.

There are 30 days in 1 month, 24 hours in 1 day, 60 minutes in 1 hour, and 60 seconds in 1 minute. Therefore,

(0.575 in/month)=(0.575 in/1 month)*(1 month/30 days)*(1 day/24 hr)*(1 hr/60 min)*(1 min/60 sec).

Canceling units leaves us with the final answer in in/sec.