Mathematics Standard 9>Chapter 7 - Mensuration>Exercise>Q 4

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9th Tamil Nadu Board

IMPORTANT

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If the area of an equilateral triangle is $k {cm}^{2}$ whose perimeter is $180 cm$ . Find the value of $k$ . [Take $\sqrt{3} = 1.732$ ]

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Important Questions on Mensuration

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 7 - Mensuration>Exercise>Q 5

An advertisement board is in the form of an isosceles triangle with perimeter

36 m

and each of the equal sides are

13 m

. If the cost of painting it at

₹ 17.50

per square metre is

₹ k

, then find the value of

k

.

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 7 - Mensuration>Exercise>Q 6

Find the area of the unshaded region.

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 7 - Mensuration>Exercise>Q 7

Find the area of a quadrilateral

ABCD

whose sides are

AB = 13 cm, BC = 12 cm, CD = 9 cm, AD = 14 cm

and diagonal

BD = 15 cm

.

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 7 - Mensuration>Exercise>Q 8

A park is in the shape of a quadrilateral. The sides of the park are

15 m, 20 m, 26 m

and

17 m

and the angle between the first two sides is a right angle. Find the area of the park.

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 7 - Mensuration>Exercise>Q 9

A land is in the shape of a rhombus. The perimeter of the land is

160 m

and one of the diagonal is

48 m

. Find the area of the land.

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 7 - Mensuration>Exercise>Q 10

The adjacent sides of a parallelogram measures

34 m, 20 m

and the measure of the diagonal is

42 m

. Find the area of the parallelogram.

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 7 - Mensuration>Exercise>Q 1

Find the total surface area and the lateral surface area of a cuboid whose dimensions are: length

= 20 cm

, breadth

= 15 cm

and height

= 8 cm

.

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 7 - Mensuration>Exercise>Q 2

The dimensions of a cuboidal box are

6 m \times 400 cm \times 1.5 m

. If the cost of painting of its entire outer surface at the rate of

₹ 22

per

m^{2}

is

₹ k

, find

k

.