B and A work at the post office sorting mail. B can sort 7 boxes in 2 hours. A can sort 13 in 4 hours. How many hours will it take for A and B to sort 25 boxes?

Question

round all answers to the nearest tenths

Answer 1

B: 7 box/2 hr

A: 13 box/4 hr

 

7/2+ 13/4

14/4+ 13/4

27/4

 

27 box/ 4 hr = 25 box/ x hour     Cross multiply

27x = 100

x= 100/27

x= 3.7 hours