
Figure below is a solid cuboid made of unit cubes. Figure is obtained after removing some unit cubes from figure .

Based on the figures shown above, the surface area of the cuboid in figure is _____ the surface area of the solid in figure .



Important Questions on Surface Areas and Volumes
Water is supplied to a village through a water tanker.
The water tanker is cylindrical in shape with diameter and height . A total of litres of water is supplied through the tanker.
How many times was the water tanker used? (The tanker was always used at full capacity.) (Use and litres)

A tent is in the shape of a right circular cylinder up to a height of and conical above it. The total height of the tent is and the radius of its base is . Find the cost of cloth required to make the tent at the rate of per square meter [Take ]
If the required answer is , what is the value of ?

Shown below is a “spherical ring". A spherical ring is a sphere with a cylindrical hole drilled through it in such a way that the centres of the cylindrical hole and the sphere coincide. The radius of the spherical ring is and the length of hole drilled is .
The curved surface area of the spherical cap (part shaded in yellow in the figure) of height , is , where is the radius of the spherical ring.
The surface area of the ring is _____sq cm.
(Note: Use and round your answer to the nearest whole number.)




A conical hole is drilled in a circular cylinder of height and base radius The height and the base radius of the cone are also the same. Find the whole surface area and volume of the remaining cylinder in terms of .

