Question

The table below shows how the number of hours needed to fill a pool depends on the flow rate of the hoses used to fill it.

Flow rate, x
(gal/hr)
Time, y
(hours)
60gal = 300hrs
45gal =400 hrs
36 gal = 500 hrs
30 gal = 600 hrs

How long will it take to fill the pool if two hoses are used, one that fills at a rate of 40 gallons per hour and one that fills at a rate of 60 gallons per hour?
100 hours
150 hours
180 hours
200 hours

Answer 1

just add 40 + 60

Answer 2

so you get 100 gallons per hour

Answer 3

we need to find how many hours though right?

Answer 4

oooh, it says hours, not gallons

Answer 5

so 60 gal takes 100 hours
40 gal takes???

Answer 6

The table is confusing. Are the 60, 45, 36, and 30 flow rates or are they the amount of gallons the hose puts out in the given times?

Answer 7

The unit says gallons but the heading says gal/hr

Answer 8

The 60, 45,36, 30 heading is Flow rate, x
(gal/hr)

Answer 9

so its the flow rate in gal/hr

Answer 10

Do you guys think it could be 150?

Answer 11

ok. I think I get it. If you multiply all the flow rates by the time you get the size of the pool as 18000 gallons

Answer 12

Per @Skielerlucas04 the two hoses have a combined flow rate of 100 gal/hr. So t = 18000/100 = 180 hr

Answer 13

yes