Question

the raddi of 2 circles are 3.5 and 7 cm find diameter and circumfrences​

Answer 1

Answer:

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Answer 2

Answer:

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Step-by-step explanation:

Given radius of circle is r=3.5 cm

as we know that

Perimeter of circle with radius r is 2πr and area of circle is πr2

So perimeter of circle is 2π(3.5)=722×7=22 cm

Area of circle  is π(3.5)2=7×422×7×7=38.5 cm2