If 3 sin x + 5cosx = 5 then what is the value of (3cosx - 5sinx)

If two persons, with equal abilities, can do two jobs in two days then 100 persons with equal abilities can do 100 similar jobs in 

If a=x+y, b=x-y, c=x+2y, then $$ {a^2+b^2+c^2}-ab-bc-ca $$ is

A man purchased a bed sheet for Rs. 450 and sold it at again of 10 % calculated on the selling price. The selling price of the bedsheets was 

There are 100 students in 3 sections A, B and C of a class. The average marks of all the 3 sections was 84. The average of B and C was 87.5 and the average marks of A is 70. The number of students in A was. 

A sum of money is to be divided among four persons in the ratio of 2:3:4:5. Out of the four, one person gets Rs. 200 more than the other and Rs.100 less than another. What is the sum?

In the given figure , ABCD is a square of side 6 cm. What is the value (in cm) of radius of circle?

The median of the following data will be _________. 

32, 25,33,27, 35, 29 and 30