Question
Lisa cleans a house in 1 hour, it takes Mia three times as long; how long will it take working together?
Answers
bobpursley
in three hours, working together, they can clean 4 houses. Right?
so rate is 4houses/3hrs, or or one house per 3/4 hr.
Ans: 45min
so rate is 4houses/3hrs, or or one house per 3/4 hr.
Ans: 45min
Lisa
Thanks so much Bob, really helps