Question

The height of a right circular cone of radius 3.5cm and volume 77cm³ is ​

Answer 1

Answer:

Hi,

Here is your answer,

Given data,

Radius = 3.5 cm

Height = 12 cm

Volume = (1/3) × pi × r² × h

= (1/3) × (22/7) × 3.5 × 3.5 × 12

22 × 3.5 × 3.5 × 12 / 3 × 7

= 22 × 3.5 × 0.5 × 4

= 22 × 3.5 × 2

= 44 × 3.5

= 154 cm²

Step-by-step explanation:

Answer 2

Answer:

Answer:

h = 6 cm

Step-by-step explanation:

Given, base area of cone = 38.5 cm².

⇒ πr² = 38.5

Given Volume = 77 cm

⇒ (1/3) * πr²h = 77

⇒ (1/3) * 38.5 * h = 77

⇒ 38.5 * h = 231

⇒ h = 6 cm.

Therefore, height = 6 cm.