Two pumps can fill a pool tank in 26 hours when working together. Alone, the second pump takes twice as long as the first to fil
l the tank. How long does it take the first pump alone to fill the tank? ____________________
1 answer:
Answer:
Step-by-step explanation:
Let's say
d1 the outflow of the first pump
d2 the outflow of the second pump
V=1 is the volume of the tank
Since the second pump takes twice as long as the first to fill the tank,

Two pumps can fill a pool tank in 26 hours when working together:

How long does it take the first pump alone to fill the tank:

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