81)

The two parallel sides of a trapezium are 17 cm and 15 cm, respectively. If the height of the trapezium is 6 cm, then its area (in m²) is:

SSC CPO 2020

A)

0.96 m²

B)

0.0096 m²

C)

9.6 m²

D)

960 m²

82)

The base of a triangle is equal to the perimeter of a square whose diagonal is \( 6\sqrt 2\) cm, and its height is equal to the side of a square whose area is 144 cm². The area of the triangle (in cm²) is:

SSC CPO 2020

A)

144

B)

216

C)

288

D)

72

83)

The area of a square and rectangle are equal. The length of the rectangle is greater than the length of a side of a square by 10 cm and the breadth is less than 5 cm. The perimeter (in cm) of the rectangle is:

SSC CPO 2020

A)

40

B)

50

C)

80

D)

100

84)

The internal measures of a cuboidal room are with length as 12 m, breadth as 8 m and height as 10 m. The total cost (in Rs.) of whitewashing all four walls of the room and also ceiling of the room, if the cost of white washing is Rs. 25 per m², is:

SSC CPO 2020

A)

12,400

B)

13,600

C)

18,000

D)

12,000

85)

A 64 cm wide path is made around a circular garden having a diameter of 10 metres. The area (in m²) of the path is closest to:

SSC CPO 2020

A)

21

B)

15

C)

9

D)

10

86)

If each side of a square is decreased by 17%, then by what percentage does its area decrease ?

SSC CPO 2020

A)

25%

B)

30.79%

C)

44.31%

D)

31.11%

87)

One side of a rhombus is 13 cm and one of its diagonals is 24 cm. What is the area (in cm²) of rhombus ?

SSC CPO 2020

A)

30

B)

90

C)

120

D)

60

88)

The sides of a triangle are 24 cm, 26 cm and 10 cm. At each of its vertex, circles of radius 4.2 cm are drawn. What is the area (in cm²) of the portion covered by the three sectors of the circle ? (π = 22/7)

SSC CPO 2020

A)

27.72

B)

92.28

C)

105.86

D)

120

89)

The perimeter of a square is half the perimeter of a rectangle. The perimeter of the square is 40 m. If its breadth is two­-thirds of its length, then what is the area (in m²) of the rectangle ?

SSC CPO 2020

A)

384

B)

321

C)

196

D)

400

90)

The internal length, breadth and height of a cuboidal room are 12 m, 8 m and 10 m, respectively. The total cost (in Rs.) of whitewashing only all four walls of the room at the cost of Rs. 25 per m², is:

SSC CPO 2020

A)

Rs. 11,400

B)

Rs. 18,000

C)

Rs. 10,000

D)

Rs. 12,600