The external radius and the length of a hollow wooden log are 16 cm and 13 cm respectively. If its thickness is 4 cm then find its T.S.A.

The internal and external diameter of a hollow hemispherical shell are 6 cm and 10 cm respectively. If it is melted and recast into a solid cylinder of diameter 14 cm, then find the height of the cylinder.

The internal and external diameters of a hollow hemispherical vessel are 20 cm and 28 cm respectively. Find the cost to paint the vessel all over at Rs. 0.14 per cm^(2) .

Length and breadth of a rectangle are 35 cm and 12 cm respectively. Find length of its diagonal.

The perimeters of the ends of a frustum of a cone are 44 cm and 8.4 pi cm . If the depth is 14 cm., then find its volume.

The side of the metallic cube is 12 cm. It is melted and formed into a cuboid whose length and breadth are 18 cm and 16 cm respectively. Find the height of the cuboid.

The central angle and radius of a sector of a circular disc are 180^(@) and 21 cm respectively. If the edges of the sector are joined together to make a hollow cone, then find the radius of the cone.

Find the total area of 12 squares whose sides are 12 cm, 13 cm, ... 23 cm respectively.

Adjacent sides of a parallelogram are 11 cm and 17 cm. If the length of one of its diagonals is 26 cm, find the length of the other.