Find the area of shaded region in the following figures (π=3.14)
Answers
Answer:
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Answer:
(a) {60}cm^{2} and (b) {267.44}cm^{2}
Step-by-step explanation:
For A ,
To find :- Area of shaded region with /pi = 3.14
Formula = Area of whole figure - Area of unshaded part = Area of shaded part
Area of whole figure = l × b
12 × 10
120
Area of unshaded part :/frac {1}{2} × base × height
/frac {1}{2} × 12 × 10
1 × 6 × 10
6 × 10
60
According to formula = Area of whole figure - Area of unshaded part
120 - 60
{60}cm^{2}
For B ,
To fibd :- Area of shaded region with /pi = 3.14
Fornula = Area of whole figure - Area of unshaded part = Area of shaded part
Area of whole figure = l × b
20 × 14
280
Unshaded part = As there are 4 parts
As the sides are 2 cm so radius will be 1 cm.
1st part = /pi {r}^{2}
3.14 × 1 × 1
3.14
As all unshaded parts are same all unshaded area will be same.
Total area = 3.14 × 4
12.56
According to formula = Area of whole figure - Area of unshaded part
280 - 12.56
{267.44}cm^{2}
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Answer ⤵⤵⤵
Answer of a is {60}cm^{2}
of b is {267.44}^{2}.
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