the area of a ring whose radii are 56 cm and 42 CM square centimetres is in sq
Answers
If the two radii are 56 and 42 then the area of a ring in sq centimetres is 4312 cm².
Step-by-step explanation:
The outer radius of the ring, R = 56 cm
The inner radius of the ring, r = 42 cm
We know that the formula of the area of a circle is given by,
Area = π*(radius)²
Therefore,
The area of the given ring is given by,
= [Area of the outer circle of the ring] – [Area of the inner circle of the ring]
= [π*R²] – [π*r²]
= π * [R² – r²]
= (22/7) * [56² – 42²] ….. [substituting the given values of R & r]
= (22/7) * [3136 – 1764]
= (22/7) * 1372
= 4312 cm²
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