Answer:
7546cm³
Step-by-step explanation:
From l² = r² + h² , we have
[tex]r = \sqrt{ {l}^{2} + {h}^{2} } = \sqrt{ {28}^{2} - {21}^{2} cm} = 7 \sqrt{7} [/tex]
so, volume of the cone = ⅓ π r² h = ⅓ × 22/7 × 7√7 cm
So , volume of the cone = 1/3πr²h = 1/3×22/7×7√7×7√7×21 cm³
= 7546cm³
