If the curved surface area of a cylinder is 126π cm² and its height is 14 cm, what is the volume of the cylinder?

What is the perimeter of a square inscribed in a circle of radius 5 cm?

If 80 litres of milk solution has 60% milk in it, then how much milk should be added to make milk 80% in the solution?

A pyramid has an equilateral triangle as its base, of which each side is 8 cm. Its slant edge is 24 cm. The whole surface area of the pyramid (in cm²) is:

Find the mode for the given distribution (rounded off to two decimal places)

Class                             5-10 10-15 15-20 20-25 25-30 30-35

Interval Frequency       8         7          6         9          11      10

The number 5769116 is divisible by which of the following numbers?

The arithmetic mean of the following data is .

23, 17,20,19,21

Two ship are on the opposite of a light house such that all three of them are collinear. The angels of depression of the two ships from the top of the light house are 30⁰ and 60⁰. If the ships are $$230 \sqrt { 3} \ $$ m apart, then find the height of the light house (in m).