A sum of money amounted to Rs.720 in 2 years and Rs.792 in 3 years when interest is compounded annually. The annual rate of interest , (in%) is:

A bookseller allowed 10 % discount on printed price. He gets 30 % commission from publisher. His profit in percent will be 

The shadow of a tower, when the angle of elevation of the sun is 60° is found to be 15 m shorter than when it is 45°. Then height of the tower is 

The radius of a circular field is equal to the side of a square field whose perimeter is 784 feet. What is the area o the circular field?

The ratio of 45% of 80% of A to 30% of 40% of B is 15: 4. If the average of A and B is 67.5, what is the value of AB?

A rectangular ground 16m long and 10m breadth. It has a gravel path 2.5m wide all around it on the outside. What is the area of the path?

In a triangle ABC, ∠ABC = 75⁰ and ∠ABC = π⁰/4, The circular measure of ∠BAC is :

The monthly income of two persons are in the ratio 2 : 3 and their monthly expenses are in the ratio 5 : 9. If each of them saves ₹600 per month, then their monthly incomes are