Study the following pie-diagrams carefully and answer the question given below it.
PERCENTAGE COMPOSITION OF HUMAN BODY 

In an office there are 50 men and 30 women and their average salary is Rs.22500 and every woman gets Rs. 400 less than a man. Find the salary of a man.

Income of A and B are in ratio 3:4 and their expenditure are in ratio 4:7 their saving are equal if A save Rs 1760 more and B increase his expenditure by Rs 880 then their saving are in ratio 7:4 .find the average income of A and B?

Direction (66-70): What should come in place of the question mark(?) in the following number series?

4, 5, 14, 51, ?

Directions: Each of the questions consists of a question followed by three statements. You have to study the questions and the statements and decide which of the statements(s) is/are necessary to answer the question. 

What is the area of the hall?
 I. Material cost of flooring per sq. meter is Rs. 250
 II. labor cost of flooring the hall is Rs. 3,500
 III. Total cost of flooring the hall is Rs. 14,500

Rahul and Rohan enter into a partnership with   their capitals in the ratio 7:9. At the end of 8^th month, Rahul  withdraws his capital. If they receive the  profits in the ratio 8:9, find how long Rohan’s capital was used.