12 boys, working 3 hours a day can complete a work in 20 days. How many hours a day must 18 boys work to complete the same work in 10 days?

12 boys, working 3 hours a day can complete a work in 20 days. How man

1.	12 boys, working 3 hours a day can complete a work in 20 days. How many hours a day must 18 boys work to complete the same work in 10 days?
A.	4 hrs
B.	18 hrs
C.	10 hrs
D.	12 hrs
Answer» B. 18 hrs

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12 boys, working 3 hours a day can complete a work in 20 days. How many hours a day must 18 boys work to complete the same work in 10 days?

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