Find the radius of a sphere whose volume equals its surface area.

Two cubes whose edges measure 3 cm, 4 cm and 5 cm respectively to form a single cube.Find its edge.Also, Find the surface area of the new cube.

A delivery company only accepts packages whose length plus girth is less than 240 centimetres where the length is the greater dimension and girth is the largest distance around it, perpendicular to the length. State the greatest volume (in centimetres cubed) of a rectangular box with square base accepted by the company for delivery.

Find the surface area of the box if l=22, w=4, and h=10. h