Question

The Browns are moving across the country. Mr. Brown leaves 3.5 hours before Mrs. Brown. If he averages 70 mph and she averages

90 mph, how many hours will it take Mrs. Brown to catch up to Mr. Brown?

Answer 1

(90-70) * x = 70 * 3.5

Rearrange:

x=(70*3.5)/(90-70)

x=245/20

x=49/4 or 12.25

Answer: It will take miss brown 12 hours and 15 mins to catch up