Mr. smith estimates that
it will take 3 hours to fill the
pool one foot using their only
hose. if the smith's
neighbors allow them to
borrow an additional hose,
how long will it take to fill the
pool to the five foot level?
a. 3 hours b. 7.5 hours c.12.5 hours d. 15 hours

B. 7.5 hours

Step-by-step explanation:

Assuming that both hoses fill at the same rate, then by simple proportion,

To raise the pool by 1 foot of water:

1 hose ---> takes 3 hours

2 hoses > fills twice as fast ---> will take half the time ---> 3/2 = 1.5 hrs

Hence with 2 hoses, it will take 1.5 hours to fill 1 foot of water.

to fill 5 feet of water, we will need 1.5 hours x 5 feet = 7.5 hours