Two pipes A and B can fill a tank in 1 h and 75 min, respectively. There is also an outlet C. If all the three pipes are opened together. The tank is full in 50 min. How much time will be taken by C to empty the full tank?

A) 100 min

B) 150 min

C) 200 min

D) 125 min

Correct answer:
A) 100 min

Description for Correct answer:
Work done by C in 1 min

= \( \Large \left(\frac{1}{60}+\frac{1}{75}-\frac{1}{50}\right) \)

= \( \Large \frac{5+4-6}{300}=\frac{3}{300}=\frac{1}{100} \)

Hence, C can empty the full tank in 100 min.

Please provide the error details in above question

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