Question

The inner and the outer diameter of a ring are 36cm and 20cm find the area of the ring

Answer 1

Answer:

your answer is 704 m sq

Step-by-step explanation:

inner radius, r = 20/2 = 10 m

outer radius, R = 36/2 = 18 m

area of ring = π(R^2 - r^2)

= 22/7 { ( 18 × 18) - (10 × 10) }

= 22/7 { 324 - 100 }

= 22/7 × 224

= 704 m sq Ans.

hope it helps......

:)

Answer 2

Area of ring is 704 square centimeter

Solution:

The area of ring is given as:

$Area\ of\ ring = \pi(R^2-r^2)$

Where,

R is outer radius of ring

r is inner radius of ring

From given,

Outer diameter = 36 cm

$Radius = \frac{diameter}{2}$

$Outer\ radius = \frac{36}{2}\\\\Outer\ Radius = 18$

Therefore,

R = 18 cm

Also given that,

Inner diameter = 20 cm

$Inner\ radius = \frac{20}{2} = 10$

r = 10 cm

Substituting in formula, we get

$Area\ of\ ring = \frac{22}{7}(18^2 - 10^2)\\\\Area\ of\ ring = \frac{22}{7}(324 - 100)\\\\Area\ of\ ring = \frac{22}{7}(224)\\\\Area\ of\ ring = 704$

Thus area of ring is 704 square centimeter

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