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A takes half as long to do a piece of wo...

A takes half as long to do a piece of work as B takes and C does it in the same time as A and B together. If all three working together would take 7 days, then find how long would each take separately?

A

21 days, 42 days, 14 days

B

20 days, 0 days, `(40)/(3)` days

C

15 days, 45 days, `(45)/(4)` days

D

15 days, 45 days, 12 days

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The correct Answer is:
A
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