The area covered by a square is 308 square cm. The length of the diagonal of the square is.

A hollow iron pipe is 21 cm long and its exterior diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weights , then the weight of the pipe (π) is. 

If a chord of length 30 cm is at a distance of 8 cm from the center of the circle, then the length of the chord of the same circle which is at a distance of 15 cm from the center is equal to

The length of the diagonal of a square is 'a' cm. Which of the following represents the area of the square (in sq. cm)? 

Find the area of triangle whose medians are 8 cm, 15 cm and 17 cm respectively?

The height of a square base right prism is 15 cm. If the total surface area of the prism is 608 cm² , then what will be the volume of prism?

Find the area of a white sheet required to prepare a cone with a height of 21cm and the radius of 20cm.

The length of a hollow thick cylindrical metallic pipe is 6 cm and its total surface area including the surface at the ends is 98π sq. cm. If the outer diameter is 8 cm, then the inner diameter in cm is