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9th CBSE

IMPORTANT

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A solid metallic cuboid of dimensions $(9 m \times 8 m \times 2 m)$ is melted and recast into solid cubes of edge $2 m$ . Find the number of cubes so formed.

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Important Questions on Volume and Surface Area of Solids

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9th CBSE

IMPORTANT

Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15B>Q 1

The diameter of a cylinder is 28 cm and its height is 40 cm. Find the curved surface area, total surface area and the volume of the cylinder.

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9th CBSE

IMPORTANT

Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15B>Q 2

A patient in a hospital is given soup daily in a cylindrical bowl of diameter

7 cm

. If the bowl is filled with soup to a height of

4 cm

, how much soup (in litres) the hospital has to prepare daily to serve

250

patients? [Take

π = \frac{22}{7}

EASY

9th CBSE

IMPORTANT

Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15B>Q 3

The pillars of a temple are cylindrically shaped. Each pillar has a circular base of radius

20 cm

and height

10 m

. Concrete mixture would be required to build

14

such pillars is

k . 6 m^{3}

. Find

k

. [Take

π = \frac{22}{7}

]

EASY

9th CBSE

IMPORTANT

Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15B>Q 4

A soft drink is available in packs: A tin can with a rectangular base of length $5 cm$ , breadth $4 cm$ and height $15 cm$ .

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9th CBSE

IMPORTANT

Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15B>Q 4

A soft drink is available in two packs: (i) a tin can with a rectangular base of length $5 cm$ , breadth $4 cm$ and height $15 cm$ and (ii) a plastic cylinder with circular base of diameter $7 cm$ and height $10 cm$ . Which container has greater capacity and by how much?

MEDIUM

9th CBSE

IMPORTANT

Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15B>Q 5

There are

20

cylindrical pillars in a building, each having a diameter of

50 cm

and height

4 m

. Find the cost of cleaning them at

₹ 14

per

m^{2}

. [Take

π = \frac{22}{7}

EASY

9th CBSE

IMPORTANT

Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15B>Q 6

The curved surface area of a right circular cylinder is

4.4 m^{2}

. If the radius of its base is

0.7 m

, find its height. [Take

π = \frac{22}{7}

]

EASY

9th CBSE

IMPORTANT

Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15B>Q 6

The curved surface area of a right circular cylinder is

4.4 m^{2}

. If the radius of its base is

0.7 m

, and its volume is

k m^{3}

, then find the value of

k

in decimal form. [Take

π = \frac{22}{7}

A solid metallic cuboid of dimensions (9 m×8 m×2 m) is melted and recast into solid cubes of edge 2 m. Find the number of cubes so formed.

Important Questions on Volume and Surface Area of Solids

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A solid metallic cuboid of dimensions $(9 m \times 8 m \times 2 m)$ is melted and recast into solid cubes of edge $2 m$ . Find the number of cubes so formed.