START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.4>Q 8

MEDIUM

8th CBSE

IMPORTANT

Earn 100

How many cubic metre of soil must be dug out to sink a well which is $21 m$ deep and has a diameter of $8 m$ ? If the soil so dug out is spread over a rectangular plot $24 m \times 11 m$ , what is the height of the platform formed?

Important Questions on Mensuration-II (Solid Figures)

MEDIUM

8th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.4>Q 9

A particular brand of milk powder is available in two packs—a tin pack with a square base of each side

6 cm

and height

14 cm

or one with a circular base of radius

3.5 cm

and height

12 cm

. Which tin has a greater capacity and by how much?

MEDIUM

8th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.4>Q 10

Into a circular drum ot radius

4.9 m

and height

3.6 m

, how many full bags of grain can be emptied if the space required for each given bag is

1.8 m^{3}

? (Take

π = 3.14

)

MEDIUM

8th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.4>Q 11

The inner diameter of a wooden cylindrical pipe is

24 cm

and its outer diameter is

28 cm

. The length of the pipe is

35 cm

. Find the mass of the pipe, if

1 {cm}^{3}

of wood has mass of

4 g

.

EASY

8th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.4>Q 12

If the lateral surface of a cylinder of height $5 cm$ is $94.2 {cm}^{2}$ , then find the radius of the base.

EASY

8th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.4>Q 12

If the lateral surfaee of a cylinder of height $5 cm$ is $94.2 {cm}^{2}$ , then find the volume of the cylinder(Use $π = 3.14$ )

MEDIUM

8th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.4>Q 13

The ratio between the curved surface area and the total surface area of a right circular cylinder is

1 : 2

. Find the volume of the cylinder, if its total surface area is

616 {cm}^{2}

.

EASY

8th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.4>Q 14

The height of a right circular cylinder is

12.6 cm

. Three times the sum of the areas of its two circular faces is twice the area of the curved surface. Find the volume of the cylinder.

MEDIUM

8th CBSE

IMPORTANT

START UP MATHEMATICS>Chapter 18 - Mensuration-II (Solid Figures)>EXERCISE 18.4>Q 15

A piece of copper of volume

4.4 {dm}^{3}

is drawn into a cylindrical wire

0.025 cm

in diameter. Find the length of the wire.