These are different questions to calculate area and Surface Area for 2D, 3D shapes

Find the area of a rectangle of length 15 mm and breadth 7 mm.

110 mm^2

105 mm^2

100 mm^2

90 mm^2

The area of a rectangle is 96 cm². If the breadth of the rectangle is 8 cm, find its length and perimeter.

12 cm, 40 cm

22 cm, 4 cm

12 cm, 50 cm

40 cm, 12 cm

How many tiles whose length and breadth are 13 cm and 7 cm respectively are needed to cover a rectangular region whose length and breadth are 520 cm and 140 cm?

50 tiles

1000 tiles

80 tiles

800 tiles

Find the cost of tiling a rectangular plot of land 300 m long and 150 m wide at the rate of $6 per hundred square m.

$2700

$700

$2000

$1800

If it costs $1600 to fence a rectangular park of length 20 m at the rate of $25 per m², find the breadth of the park and its perimeter. Also, find the area of the field.

b =12 m, P = 64 m, A = 240 m²

b =8 m, P = 50 m, A = 240 m²

b =12 m, P = 20 m, A = 170 m²

b =16 m, P = 64 m, A = 70 m²

Draw a rectangle with perimeter= 24 cm and breadth= 5 cm in the grid below.

Answer :

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Find the height of a triangle whose Area = 420 cm² base = 60 cm

10 cm

20 cm

14 m

14 cm

Find the area of an isosceles right-angled triangle of equal sides 15 cm each.

112.5 cm²

122.5 cm²

212.5 cm²

235 cm²

Find the area of a square whose side is 13 cm

169 cm^2

269 cm^2

69 cm^2

40 cm^2

Which of the following is **not** a formula to find the circumference of a circle?

π(r^2)

πd

2πr

π(d^2)

What is the formula to find the area of a circle?

πd

π(r^2)

π(d^2)

2πr

What is the circumference of a circle that has a diameter of 7 cm?

20.9 cm²

22 cm²

24.6 cm²

28.3 cm²

What is the area of a circle that has a radius of 5 cm?

78.5 cm²

79 cm²

79.5 cm²

85.4 cm²

What is the radius of a circle that has an area of 42 cm**²**?

3.5 cm

3.6 cm

3.7 cm

4 cm

Find the area of the following parallelogram.

Step 1:

Area of Parallelogram = b × h; b = base = 14 in; h = height = 6 in.

Step 2:

Area of given parallelogram = 14 × 6 = 84 square in.

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**Find the area of the following parallelogram.**

Step 1:

Area of Parallelogram = b × h; b = base = 40 in; h = height = 15 in.

Step 2:

Area of given parallelogram = 40 × 15 = 600 square in.

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Find the area of the following trapezoid.

Area of Trapezoid = (1/2) x h x (b1+b2 )

b1, b2 = bases = 3, 4; h = height = 5.

Step 2:

Area of trapezoid = (1/2) × 5 ×( 3+4) = 17.5 square in.

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What is the radius of a sphere with a surface area of 16?

2

2/(π^0.5)

4

4/(π^0.5)

Find the surface area of the following cylinder.

SA=2(πr²)+(2πrh)

SA=2π(4)²+2πx4x9

SA=104π m**²**

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What is the surface area of a cylinder with a radius of 3 and height of 7?

63π

51π

63

51

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