Each of the questions given below consists of a question followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question.
How many workers are required for completing the construction work in 10 days?
20% of the work can be completed by 8 workers in 8 days.
20 workers can complete the work in 16 days.
One-eighth of the work can be completed by 8 workers in 5 days.