Question

A worm crawled the first 4 hours of its journey at speed of 15

meters per hour and the remaining 7 hours at 12 meters per
hour. How far is the whole journey in meters?
meters

Answer 1

144 meters.

Explanation:

If he starts the first 4 hours at 15 meters per hour, he will have traveled 60 meters. If he does the rest of the 7 at 12 meters per hour, he will have traveled another 84 meters. If you add them together you get a total journey of 144 meters.