Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 3

MEDIUM

8th CBSE

IMPORTANT

Earn 100

A playground has the shape of a rectangle, with two semi-circles on its smaller sides as diameters, added to its outside. If the sides of the rectangle are $36 m$ and $24.5 m$ , the area of the playground is $k m^{2}$ . Find the value of $k$ up to one decimal place. (Take $π = 22 / 7$ ).

50% studentsanswered this correctly

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

HARD

8th CBSE

IMPORTANT

Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 4

A rectangular piece is

20 m

long and

15 m

wide. From its four corners, quadrants of radii

3.5 m

have been cut. The area of the remaining part is

k m^{2}

. Find the value of

k

.

HARD

8th CBSE

IMPORTANT

Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 5

The inside perimeter of a running track (shown in Fig.) is $400 m$ . The length of each of the straight portion is $90 m$ and the ends are semi-circles. If track is everywhere $14 m$ wide, find the area of the track. Also, find the length of the outer running track.

Question Image

MEDIUM

8th CBSE

IMPORTANT

Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 6

Find the area of Fig., in square

cm

, correct to one place of decimal. (Take

π = 22 / 7

)

Question Image

HARD

8th CBSE

IMPORTANT

Mathematics for Class 8>Chapter 20 - Mensuration-I (Area of a Trapezium and a Polygon)>EXERCISE>Q 7

The diameter of a wheel of a bus is

90 cm

which makes

315

revolutions per minute. Determine its speed in kilometers per hour. [Use

π = 22 / 7

]

MEDIUM

8th CBSE

IMPORTANT

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

The area of a rhombus is

240 {cm}^{2}

and one of the Diagonal is

16 cm

. Find another diagonal (in

cm

).

EASY

8th CBSE

IMPORTANT

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

The diagonals of a rhombus are

7.5 cm

and

12 cm

. Find its area (in

{cm}^{2}

).

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.