Question

Mr. Smith estimates that

Answer 1

Answer:

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

Answer 2

Answer:

12.5

Step-by-step explanation:

visualizing the hours and amount of water by foot being poured into the pool you can see that 3 and 7.5 hours is too small and 15 is too large.