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Pipe D1 can fill an empty tank in 80 min...

Pipe `D_1` can fill an empty tank in 80 minutes and Pipe `D_2` can empty the same tank in 100 minutes. If pipes are opened simultaneously, then in how much time the tank gets completely filled?
पाइप `D_1`, एक खाली टैंक को 80 मिनट में भर सकता है और पाइप `D_2` उसी टैंक को 100 मिनट में खाली कर सकता है। यदि दोनों पाइप एक साथ खोले जाते हैं, तो टैंक कितने समय में पूरी तरह से भर जाएगा?

A

320 minutes

B

400 minutes

C

200 minutes

D

240 minutes

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