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Two teachers A and B can complete an aca...

Two teachers A and B can complete an academic work in 10 days and 15 days respectively.They started the work together, but A left after 5 days and another teacher C joined, who alone can complete the work in 60 days. In how many days the work got completed?
दो शिक्षक A और B क्रमशः 10 दिनों और 15 दिनों में एक शैक्षणिक कार्य पूरा कर सकते हैं। उन्होंने एक साथ काम शुरू किया, लेकिन A 5 दिनों के बाद छोड़ दिया और एक अन्य शिक्षक C इस कार्य में शामिल हो गया, जो अकेले 60 दिनों में इस काम पूरा कर सकता है। यह कार्य कितने दिनों में पूरा होगा?

A

7

B

5

C

6

D

2

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