It takes an older pump 4 times as long to drain a certain pool as it does a newer pump. Working together, it takes the two pumps 3 hours to drain the pool. How long will it take the newer pump to drain the pool working alone?
Do not do any rounding.

New pump = 3.75 hours

Old pump = 15 hours

Step-by-step explanation:

Let :

Time taken by newer pump = x hrs

Time taken by older pump = 4x hrs

Time taken when working together = 3 hours

Drain rate :

Newer pump = 1/x

Older pump = 1/4x

Combined = 1/3

Hence :

Newer pump rate + older pump rate = combined rate

1/x + 1/4x = 1/3

Take the lcm

(4 + 1) / 4x = 1/3

Cross multiply

5 * 3 = 4x

15 = 4x

x = 15/4

x = 3.75

The old pump will take :

4x = 4 * 3.75 = 15 hours

what level of math? also i don't need to be paid if i can you.

sas (side angle side)

aa (angle angle)

sss(side side side)

sas find two sides with an angle in between

aa is finding two angles and the third will add up to 180

sss find all sides

step-by-step explanation: