Surface Area

If the side of a cube increases by 10%, find the percentage increase in its surface area.

Find the total surface area of a hemisphere if its volume is 18π cubic cm.

A spherical ball of radius 3 cm is melted and recast into three spherical balls. The radii of two of the balls are 1.5 cm and 2 cm. Find the radius of the third ball.

The sum of the length, breadth, and height of a cuboid is 19 cm and the length of its diagonal is 11 cm. Find its total surface area.

If the radii of two spheres are in the ratio 1:4, then their surface areas are in the ratio: