Tributaries

We can fill the pool with two different tributaries. The first inflow would fill the pool in 18 hours and by both in 6 hours. How many hours would the pool fill with a second inflow?

Correct answer:

t2 =  9 h

Step-by-step explanation:

t1=18 h t=6  t (1/t1 + 1/t2)=1  t (t2/t1+1)=t2 6 (t2/18+1)=t2  12t2=108  t2=12108=9  t2=9=9 h



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