A sum of money becomes eight times of itself in 3 years at compound interest. The rate of interest per annum is 

A mixture contains milk and water in the ratio 5: 1. On adding 4 litres of water, the ratio of milk and water becomes 5: 2. What is the quantity of milk in the original mixture?

The top of two poles of height 24m and 36 m are connected by a wire. If the wire makes an angle of 60° with the horizontal, then the length of the wire is 

The ratio between the volume (cm³) of a cylinder and the curved surface area (cm²) is numerically 14: 1. If the height of the cylinder is 50 cm, what is the volume of the cylinder (cm³) ?

Direction: Study the following graph carefully and answer the following questions.

The production of company D is approximately how many time that of the production of company A?

If a number x is 10% less than another number y and y is 10% more than 125, then x is equal to-

The single discount which is equivalent to three successive discounts of 25%, 20% and 10% is-

In a mixture 25 litres, the ratio of milk and water is 4:1. How many litres of milk must be added to make the ratio 16:1?