A mason can build a tank in 12h. After working for 6h, he took help of a boy and finished the work in another 5h. The time that the boy will take alone to complete the work is

A mason can build a tank in 12h. After working for 6h, he took help of

1.	A mason can build a tank in 12h. After working for 6h, he took help of a boy and finished the work in another 5h. The time that the boy will take alone to complete the work is
A.	30 Hrs
B.	45 Hrs
C.	60 Hrs
D.	64 Hrs
Answer» D. 64 Hrs

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A mason can build a tank in 12h. After working for 6h, he took help of a boy and finished the work in another 5h. The time that the boy will take alone to complete the work is

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