Answer
x = 22 hours
Work Step by Step
Step 1) 15sec/ft = x/5280ft
Step 2) 15sec/ft * 5280 = x/5280 * 5280
Step 3) 79, 200sec = x hours
Step 4) 79, 200 seconds ÷ 3600 sec = 22 hrs ---
An insect crawls 1 ft in 15 seconds. To find the number of hours it will take to crawl 1 mile, set up a proportion. 15 sec/1 ft equals x seconds/5280 ft (because there are 5280 feet in a mile). Cross-multiply and solve for x. Then, divide x by 3600 seconds (because there are 3600 seconds in one hour) to get the number of hours it will take to crawl 1 mile.
