Answer:
154 mm²
Explanation:
Given : -
Radius ( r ) = 7 mm
The value of π = 22/7
To find : Area of a cirlce
Formula : -
A = πr²
A = 22/7 * 7²
= 22/7 * 7 * 7
= (22 * 7 * 7)/7
= 22 * 7
A = 154 mm²
Hence,
the Area of the Circle is 154 mm².
1.54 × 10-4m²
Unit Conversion,
r = 7 × 10-3m
Solution,
A = πr2 = π · (7 × 10-3)² ≈ 1.54 × 10-4m²
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