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A, B and C can complete a piece of work ...

A, B and C can complete a piece of work in 10, 20 and 60 respectively. Working together, they can complete the same work in how many days ?
A, B और C किसी कार्य को क्रमशः 10, 20 और 60 दिनों में पूरा कर सकते हैं | एक साथ कार्य करते हुए, वे इसी कार्य को कितने दिनों में पूरा करेंगे ?

A

5

B

6

C

10

D

8

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