Two valves

Water fills the pool with two valves for 11 days. After 7 days, the workers stopped the first and second valve fill pool for 7 days.

How many days took to fill the pool of each of the valves individually?

Correct answer:

x =  25.67 d
y =  19.25 d

Step-by-step explanation:

x=1/(1/111/(7/(17/11)))=25.67 d
x1+y1=111 7y1=1117  y=7/(17/11)=19.25 d  x1=111y1 x1=11119.251 x1=0.039 x=25.67 d



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