Question

please answer the question 11

Answer 1

Answer:

Simple use pi*r2 formula and carry out subtraction...that's it

Answer 2

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Here is your answer

Length of rectangular sheet = 34 cm
Breadth of rectangular sheet is 24 cm

Now. Area of rectangular sheet is = L× B
$= 34 \times 24 \\ = 816cm {}^{2}$
Now
Diameter of circular button is 3.5 cm
Radius is Diameter/2
$= \frac{3.5}{2} \\ = 1.75cm$

Area of circular button = π×r^2
$= \frac{22}{7} \times (1.75) {}^{2} \\ = \frac{22 \times 1.75 \times 1.75}{7} \\ = 9.625 \: cm {}^{2}$
Area of 64 buttons = 64× 9.625
$= 616 \: cm {}^{2}$
Area of Remaining Sheet=. Area of rectangular sheet - Area of 64 circular button
$= 816 - 616 \\ = 200 \: cm {}^{2}$

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