Question

give me answer of 7th and 8th fastly​

Answer 1

Step-by-step explanation:

QUESTION 7.

case 1

wire length =440m

moulded into a circle

therefore, circumference of that circle be 440m

circumference of circle = 2πr

440 = 2πr

440/2π = r

220/π = r

Now, area of circle = πr^2

= π × (220/π)^2

= π × (220×220) / π×π

= 220 × 220 / π

= 220 × 220 × 7/22

= 10 × 220 × 7 = 15400 m^2

case 2

since all 4 sides of square are equal

then divide 440m by 4 = 440/4 = 110m

therefore, all 4 sides will have 110 m length

Area of square = a^2 = (110)^2 = 12100m^2

Now, ratio of

area of circle/Area of square = 15400/12100

Area of circle/Area of square = 154/121

Area of circle/Area of square = 14/11 = 14:11

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QUESTION 8.

RADIUS OF CIRCLE = 8cm

Then diameter = 16cm

diagonal of inscribed square = diameter of that circle

Area of square = d^2/2

where d is the diagonal of square

AREA OF SQUARE = (16 × 16)/2

AREA OF SQUARE = 8 × 16 = 128 m^2