Parvesh is three times as efficient as Dinesh. Parvesh takes 20 days less than Dinesh to complete a book. If both of them work together, then in how many days will the book be completed?

Parvesh is three times as efficient as Dinesh. Parvesh takes 20 days l

1.	Parvesh is three times as efficient as Dinesh. Parvesh takes 20 days less than Dinesh to complete a book. If both of them work together, then in how many days will the book be completed?
A.	7.5
B.	8
C.	10
D.	6.5
Answer» B. 8

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Parvesh is three times as efficient as Dinesh. Parvesh takes 20 days less than Dinesh to complete a book. If both of them work together, then in how many days will the book be completed?

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