the radius of a circle is 7 cm find its circumference and area what will happen to its circumference and area if the radius is tripled
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Circumference = 2 * 22/7 * 7
= 44 cm
Area = 22/7 * 7 * 7
= 154 cm²
If radius is tripled =>
Circumference = 2 * 22/7 * 21
= 132 cm
Area = 22/7 * 21 * 21
= 1386 cm²
When radius is tripled =>
Circumference becomes 3 times larger.
Area becomes 9 times larger.
Answered by
1
Answer:
The radius of circle is 7cm
The circumference of circle is
2πr2722×744cm
The area of circle is
πr2722×7×7=154cm
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