Manish completes a work in 20 days. After 8 days Sriram joined the work. In how many days will the work be completed ? Statements : I. Sriram takes twice the time than Manish to complete the work. II. Sriram completes half the work in 15 days.

A) Statement I alone is sufficient to answer the question

B) Statement II alone is sufficient to answer the question

C) Either the statements I & II is sufficient to answer the question

D) Neither the statements I & II is sufficient to answer the question