MEDIUM
8th CBSE
IMPORTANT
Earn 100

A solid cube is cut into two cuboids of equal volumes. Find the ratio of the total surface area of the given cube and that of one of the cuboids.

Important Questions on Mensuration-II (Solid Figures)

MEDIUM
8th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.2>Q 13
The dimensions of a rectangular box are in the ratio of 2 : 3 : 4 and the difference between the cost of covering it with a cloth at the rate of ₹10 and ₹11 per m2 is ₹1300 . Find the dimensions of the box.
MEDIUM
8th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.2>Q 14
A rectangular swimming pool 30 m long and 20 m wide and 1.5 m deep is to be tiled. If each tile is 50 cm ×50 cm. How many tiles will be required?
HARD
8th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.2>Q 15
A log of wood of dimensions 2 m×20 cm×10 cm is cut into small blocks of 10 cm x 5 cm x 4 cm. How many blocks do we get? What will be the total surface area of all these blocks?
MEDIUM
8th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.2>Q 16
The dimensions of a building are 30 m x 20 m ×40 m. If the walls, floor and roof of this building are to be repaired, the contractor asks for ₹50 per square metre. What will be the estimate of the contractor for this work?
MEDIUM
8th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.3>Q 1
The radius of a right circular cylinder is 7 cm and its height is 14 cm. Find its curved surface area and total surface area.
MEDIUM
8th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.3>Q 2

The curved surface area of a cylinder is 1,000 cm2 and the radius of its base is 21 cm. Find the total surface area of the cylinder.

(Take π=227)

MEDIUM
8th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.3>Q 3
An open cylindrical oil tank has diameter 14 m and height 9 m. If the inner side of the tank has to be painted all over, what will it cost at ₹40 per square metre? (Take π=227)
MEDIUM
8th CBSE
IMPORTANT
START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.3>Q 4
The inner diameter of a circular well is 3.5 m and it is 12 m deep. Find the cost of plastering the inner surface at the rate of ₹4 per square metre. (Take π=227)