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A and B can finish a work together in 30...

A and B can finish a work together in 30 days, B and C can finish the same work together in 24 days and A and C can finish the same work together in 40 days. If all three work together, how long will it take them to complete the work?
A और B किसी कार्य को 30 दिनों में समाप्त कर सकते हैं | B और C इसी कार्य को 24 दिनों में तथा A और C इसी कार्य को एक साथ 40 दिनों में समाप्त कर सकते हैं | यदि ये तीनों साथ कार्य करें, तो उन्हें कार्य समाप्त करने में कितना समय लगेगा ?

A

20 days

B

5 days

C

10 days

D

15 days

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