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C can do a piece of work alone in 120 da...

C can do a piece of work alone in 120 days. B is twice efficient than C and A is thrice efficient than B. In how many days they can complete the work together?
C किसी कार्य को 120 दिनों में अकेले कर सकता हैं |B, C से दोगुना कुशल है और A, B से तिगुना कुशल है | वे एक साथ मिलकर कार्य को कितने दिनों में पूरा कर सकते हैं?

A

13.33

B

16.67

C

12.5

D

15

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