Question

small cone with radius 3 centimetre is cut from the upper portion of the radius of the circular base is 12cm

Answer 1

★ Corrected Question :

• small cone with radius 3 centimetre is cut from the upper portion of the radius of the circular base is 12cm , with height 20 cm. find h2 ? Also find volume of Frustum ?

★ Required Solution :

✰ Value Given to us :

• ➸ r1 = 12 cm

• ➸ h1 = 20 cm

• ➸ r2 = 3cm

✰ Formula Used Here :

• ➲ r1 / r2 = h1 / h2

✰ Putting Value in Formula :

• ➸ r1 / r2 = h1 / h2

• ➸ 12 / 3 = 20 / h2

• ➸ h2 = 5 cm

✰ Volume of Frustum :

• ⇢ 1 / 3 πrh ( r1² + r2² + r1 × r2 )

• ⇢1 / 3 × 22 / 7 × 15 ( 12² + 3² + 12 × 3 )

• ⇢ Volume = 110 / 7 × ( 144 + 9 + 36 )

• ⇢ Volume = 110 / 7 × 189

• ⇢ Volume = 2970 cm

★ Therefore :

• ➦ Volume of Frustum is 2970 cm

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Answer 2

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Th Volume of Frustum is 2970 cm.