Question

The radius of circular ends of a solid circle of a circle are 12 cm. Find the volume and the total surface area

Answer 1

Solution

Given :-

• Radius of solid circle = 12 cm

Find :-

• Volume & Total surface area

Explanation

Using Formula

★ Volume of solid circle = 4/3 πr³

★ Total surface area of solid circle = 4πr²

Calculate one by one

==> Volume of solid circle = 4/3 × 22/7 × (12)³

==> Volume of solid circle = 88× 12 × 12 × 12/(3× 7)

==> Volume of solid circle = 50,688/7

==> Volume of solid circle = 7241.14 cm³

Now, Calculate Total surface area

==> Total surface area = 4πr²

==> Total surface area = 4 × 22/7 × 12²

==> Total surface area = 88/7 × 12 × 12

==> Total surface area = 12,672/7

==> Total surface area = 1810.28 cm²

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