Answer:
The expression that can use to find the volume of the cylinder is V = Bh = π(4)²(7) ⇒ A
Explanation:
The formula of the volume of a cylinder is V = Bh, where
- B is the area of the base which is a circle, then it is B = πr²
- h is the height of the cylinder
In the given figure
∵ The composite figure formed from a cylinder and a cone
∵ They have the same base which is a circle
∵ The radius of the circle is 4 cm
∴ The radius of the base of the cylinder is 4 cm
∴ r = 4 cm
→ Find the area of the base B
∵ B = πr²
∴ B = π(4)²
∵ The height of the cylinder is 7 cm
∴ h = 7 cm
→ Substitute the values of B and h in the rule of the volume above
∴ V = π(4)²(7)
∴ V = BH = π(4)²(7)
∴ The expression that can use to find the volume of the cylinder is
V = Bh = π(4)²(7)