Answer:
B
Step-by-step explanation:
The volume of a cone (V) is calculated as
V = [tex]\frac{1}{3}[/tex] πr²h ( r is the radius and h the height )
Here V = 151 and r = diameter ÷ 2 = 12 ÷ 2 = 6 , then
[tex]\frac{1}{3}[/tex] πr²h = 151 ( multiply both sides by 3 to clear the fraction )
πr²h = 453 , that is
3.14 × 6² × h = 453
3.14 × 36h = 453
113.04h = 453 ( divide both sides by 113.04 )
h ≈ 4 m ( to the nearest metre ) → B
