The diameter of a coin is 4.2 cm. Find its surface area.
Answers
Answered by
3
Given:
The diameter of a coin is 4.2 cm
- Radius = d/2 => 4.2/2 => 2.1 cm
Formula: Circumference of circle = 2πr
Solution:
Circumference of circle = 2πr
= 2 × 22/7 × 2.1
= 44/7×21/10
= 44 × 3/10
= 13.2
Answered by
2
Answer:
as we know that coin is circle
area of circle = Pi ✖ square of radius
=3.14 ✖ 2.1 ( because diameter = 4.2)
= 6.594 sq. cm
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