How long would it take all three to fold 386 bed sheets?

Question

Sally can fold 15 bed sheets in 4 minutes. Eric can fold 12 bed sheets in 5 minutes. Jane can fold 7 bed sheets in 2 minutes.

How long would it take all three to fold 386 bed sheets?

 

a. 20 minutes

b. 35 minutes

c. 37 minutes

d. 40 minutes

 

Answer 1

Sally's rate / minute = 15/4        Eric's rate = 12/5       Jane's rate = 7/2

 

In one minute they can fold 3.75 + 2.4 + 3.5 = 9.65 bed sheets     386 / 9.65 = 40 

 

Your answer is d. 40 minutes