Mathematics for Class 9>Chapter 12 - Mensuration>EXERCISE 12.3>Q 9

HARD

9th Manipur Board

IMPORTANT

Earn 100

A cylindrical metal pipe of thickness $1.4 cm$ and external diameter $56 cm$ is $14 m$ long. Find the volume of metal used in the construction of pipe.

Important Questions on Mensuration

MEDIUM

9th Manipur Board

IMPORTANT

Mathematics for Class 9>Chapter 12 - Mensuration>EXERCISE 12.3>Q 10

The volume of a right circular cylinder of height

24 cm

is

924 {cm}^{3}

. Find the area of the curved surface of the cylinder.

MEDIUM

9th Manipur Board

IMPORTANT

Mathematics for Class 9>Chapter 12 - Mensuration>EXERCISE 12.3>Q 11

Find the depth of well of radius

3.5 m

if its capacity is equal to that of a rectangular tank of dimensions

25 m \times 11 m \times 7 m

.

MEDIUM

9th Manipur Board

IMPORTANT

Mathematics for Class 9>Chapter 12 - Mensuration>EXERCISE 12.3>Q 12

A well of diameter

3.5 m

is dug

16 m

deep. The earth taken out is spread evenly to form a rectangular platform of base

11 m \times 7 m

. Find the height of the platform.

HARD

9th Manipur Board

IMPORTANT

Mathematics for Class 9>Chapter 12 - Mensuration>EXERCISE 12.3>Q 13

Find the volume, the curved surface area and total surface area of a cone, when radius of base

= 3.5 m

and height

= 12 m

HARD

9th Manipur Board

IMPORTANT

Mathematics for Class 9>Chapter 12 - Mensuration>EXERCISE 12.3>Q 13

Find the volume, the curved surface area and total surface area of a cone, when radius of base

= 0.7 m

and slant height

= 2.5 m

.

HARD

9th Manipur Board

IMPORTANT

Mathematics for Class 9>Chapter 12 - Mensuration>EXERCISE 12.3>Q 13

Find the volume, the curved surface area and total surface area of a cone, when the radius of base

= 21 cm

and slant height

= 35 cm

.

HARD

9th Manipur Board

IMPORTANT

Mathematics for Class 9>Chapter 12 - Mensuration>EXERCISE 12.3>Q 13

Find the volume, the curved surface area and total surface area of a cone, when the height

= 24 cm

and slant height

= 25 cm

.

HARD

9th Manipur Board

IMPORTANT

Mathematics for Class 9>Chapter 12 - Mensuration>EXERCISE 12.3>Q 13

Find the volume, the curved surface area and total surface area of a cone, when the Perimeter of base

= 88 cm

and height

= 48 cm

.