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Doctors Medicines MCQs Q&A

  1. 1000π cm2
  2. 490π cm2
  3. 640π cm2
  4. 810π cm3
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1 Answers

Option 4 : 810π cm3

Given:

Radius of the cone r = 9 cm

Height of cone h = 9 cm

Radius of cylinder R = 9 cm

Height of cylinder H = 7 cm

Formula:

Volume of cone = (1 / 3) × πr2h

Volume of cone = πR2H

Calculation:

Volume of shape = (1 / 3) × πr2h + πR2H

⇒ (1 / 3) × π × 9 × 9 × 9 + π × 9 × 9 × 7

⇒ 81π × (3 + 7)

⇒ 81π × 10

⇒ 810π

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