Question

)Find the radius and area of a circle whose circumference is 132 cm.

Answer 1

Answer:

R = 66/π

Area = 4356/π

Step-by-step explanation:

Answer 2

Given :-

• Circumference of circle = 132 cm

To Find :-

• Radius of circle = ?
• Area of circle = ?

Solution :-

➻ Circumference of circle = 2πr

➻ 132 = 2πr

➻ 132/2 = 22/7 × r

➻ 66 = 22/7 × r

➻ r = 66× 7/22

➻ r = 3 × 7

➻ r = 21 cm

Therefore,Radius of circle is 21 cm.

→ Area of circle = πr²

→ Area of circle = 22/7 (21)²

→ Area of circle = 22/7 (441)

→ Area of circle = 22 × 63

→ Area of circle = 1386 cm²

Therefore,Area of circle is 1386 cm².

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Extra Shots :-

• Volume of cylinder = πr²h
• T.S.A of cylinder = 2πrh + 2πr²
• Volume of cone = ⅓ πr²h
• C.S.A of cone = πrl
• T.S.A of cone = πrl + πr²
• Volume of cuboid = l × b × h
• C.S.A of cuboid = 2(l + b)h
• T.S.A of cuboid = 2(lb + bh + lh)
• C.S.A of cube = 4a²
• T.S.A of cube = 6a²
• Volume of cube = a³
• Volume of sphere = 4/3πr³
• Surface area of sphere = 4πr²
• Volume of hemisphere = ⅔ πr³
• C.S.A of hemisphere = 2πr²
• T.S.A of hemisphere = 3πr²