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Using the together rate, it is found that the time it would take the second pump, working alone, to fill the tank is:
B. 90 minutes
The together rate is the sum of each separate rate.
In this problem:
Then:
[tex]\frac{1}{150} + \frac{1}{x} = \frac{1}{60}[/tex]
[tex]\frac{x + 150}{150x} = \frac{1}{60}[/tex]
Applying cross multiplication:
[tex]150x = 50x + 9000[/tex]
[tex]100x = 9000[/tex]
[tex]x = \frac{9000}{100}[/tex]
[tex]x = 90[/tex]
Hence, it would take 90 minutes for the second pump, working alone, to fill the tank.
A similar problem is given at https://brainly.com/question/25159431