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30 persons can complete a work in 10 day...

30 persons can complete a work in 10 days. If they work 4 hours per day, then in how many days 45 persons can complete double the work if they work 8 hours per day? It is known that 2 persons of first type can do the same work in 2 hours that can be completed by 4 persons of 2nd type in 1 hour.

A

`6(2)/(3)` days

B

9 days

C

8 days

D

7 days

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The correct Answer is:
A
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