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Find the volume of a cone which has a base radius of 7 cm and height 21 cm. (The value of π is 22/7)
1. 1008 cm3 
2. 1078 cm3
3. 778 cm3
4. 1068 cm3

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Correct Answer - Option 2 : 1078 cm3

Given: 

The radius of the cone = 7 cm

Height of the cone = 21 cm

Formula used:

Volume of a cone = (1/3) × π × r2 × h

Where, r = radius of the cone

h = Height of the cone

Calculations:

Volume of the cone = (1/3) × π × r2 × h

⇒ (1/3) × π × 72 × 21

⇒ (1/3) × (22/7) × 49 × 21

⇒ 1078 cm3

∴ The volume of the cone is 1078 cm3.

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