17. Find the area of the shaded portion in the following figures :on notebooks
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1
Answer:
answer
a. 616/14 cm²
b.152m²
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Preetnoor04:
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who r u
a. 616/14cm²
b.42m²
2 nd answer is wrong
yes I know
42m²
yrs
sunny
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4
(i) Outer Radius (R) = 4.5 cm
Inner radius (r) = 2.5 cm
Area of shaded region = Area between concentric circle :
= π(R²-r²)
= 22/7[(4.5)²-(2.5)²]
= 22/7(20.25-6.25)
= 22/7×14
= 22×2
Area of shaded region = 44 cm²
(ii) Side of square (a) = 14 m
Radius of the circle (r) = a/2
r = 14/2
r = 7 m
Area of shaded region :
= Area of square - Area of circle
= a²-πr²
= 14² - 22/7×7×7
= 14×14 - 22×7
= 196-154
Area of shaded region = 42 m²
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