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Question 97
A tank can be filled in 30 minutes. There is a leakage which can empty the tank in 90 minutes. Therefore, the tank will be filled in
Solution
Tank will be filled in 1 minute =Â $$\frac{1}{30}-\frac{1}{90}=\frac{3-1}{90}=\frac{2}{90}=\frac{1}{45}$$
So, tank will be filled in 45 minutes.
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