Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 9

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8th CBSE

IMPORTANT

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The diagonals of a rhombus are $7.5 cm$ and $12 cm$ . Find its area (in ${cm}^{2}$ ).

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Important Questions on Mensuration-I (Area of a Trapezium and a Polygon)

EASY

8th CBSE

IMPORTANT

Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 10

The diagonal of a quadrilateral shaped field is

24 m

and the perpendiculars dropped on it from the remaining opposite vertices are

8 m

and

13 m

. Find the area of the field (in

m^{2}

).

EASY

8th CBSE

IMPORTANT

Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 11

Find the area of a rhombus whose side is

6 cm

and whose altitude is

4 cm

. If one of its diagonals is

8 cm

long, find the length of the other diagonal.

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IMPORTANT

Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 12

The floor of a building consists of

3000

tiles which are rhombus shaped and each of its diagonals are

45 cm

and

30 cm

in length. Find the total cost of polishing the floor, if the cost per

m^{2}

is

₹ 4

.

EASY

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IMPORTANT

Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 13

A rectangular grassy plot is

112 m

long and

78 m

broad. It has a gravel path

2.5 m

wide all around it on the side. Find the area of the path and the cost of constructing it at

₹ 4.50

per square metre.

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IMPORTANT

Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 14

Find the area of a rhombus (in

{cm}^{2}

), each side of which measures

20 cm

and one of whose diagonals is

24 cm

.

MEDIUM

8th CBSE

IMPORTANT

Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 15

The length of a side of a square field is

4 m

. What will be the altitude of the rhombus, if the area of the rhombus is equal to the square field and one of its Diagonal is

2 m

?

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8th CBSE

IMPORTANT

Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 16

Find the area of the field in the form of a rhombus (in

{cm}^{2}

), if the length of each side be

14 cm

and the altitude be

16 cm

.

MEDIUM

8th CBSE

IMPORTANT

Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 17

The cost of fencing a square field at

60

paise per metre is

₹ 1200

. Find the cost of reaping the field at the rate of

50

paise per

100 sq

. metres.