Radius of a circle is (21 ± 0.1) cm find its area with error.
Answers
Answered by
2
Explanation:
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Answer
Radius of a circle, r = 21 cm
Perimeter of a quadrant, P=(
2
π
+2)r units
=(
7×2
22
+2)×21=(
14
22
+2)×21
P=(
14
22+28
)×21=
14
50
×21
=75cm.
Area of a quadrant, A=
4
πr
2
sq. units
A=
7
22
×
4
21×21
=346.5cm
2
.
Answered by
2
Answer:
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