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A pipe fills a tank in 30 minutes. Due to a leak, only 4/5 of the tank is filled in 30 minutes. How long would the leak take to empty the full tank?

Class 8Leaks and Changing PipesDirect and Inverse Proportions

A150 minutes
B120 minutes
C60 minutes
D37 1/2 minutes

Step-by-Step Solution

Net:

\frac{4}{5}

in 30 min, so

\frac{4}{150}

per min. Leak:

\frac{1}{30} - \frac{4}{150} = \frac{5 - 4}{150} = \frac{1}{150}

: 150 minutes.

Answer: A) 150 minutes

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