Read and fill in the gaps(e) Height of Devid is 3 cm less than Aminur. If hiehgt of Aminur is 'x' cm, height of Devid is ― cm.

The altitude of a right triangle is 7 cm less than its base. If the hypotenuse is 13 cm, find the other two sides.

A right circular cone is made by melting a piece of metal right cylinder of radius 8 cm and height 2 cm . If the height of the cone is 3 times the height of the cylinder , then what will be the curved surface area of the cone ?

25 small metal cones of radius 6 cm each are made by melting a large right circular cone of radius 15 cm and of height 20 cm . Find the height of the small cones.

The height of a right circular cone is 21 cm and the radius of its base is 12 cm. Its volume is :

By melting a sphere of radius r cm, if a right circular cylinder of same base radius made, then the height of the cylinder is r cm.

Show that the height of the cone of maximum volume that can be inscribed in a sphere of radius 12 cm is 16 cm .

In the adjacent figure, the height of a solid cylinder is 10 cm and diameters is 7 cm . Two equal conical holes of radius 3 cm and height 4 cm are cut off as shown the figure. Find the volume of the remaining solid.

The circumference of the base of a 16 cm height solid cone is 33 cm. What is the volume of the cone in cm^3 ?

The radii of the circular ends of a frustum are 6 cm and 14 cm. If its slant height is 10 cm, then its vertical height is___