A heap of rice is in the form of a cone of diameter 12 m and height 8 m . Find it's volume ? How much canvas cloth is required to cover the heap ?
[ use π = 3.14 ]
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Answer:
Given
A heap of rice is in the form of cone
Diameter of cone = 12 m
2r = 12
r = 12 / 2
r = 6 m
It's height = 8 m
Volume of cone = 1/3 πr² h
→ 1/3 × 3.14 × 6 × 6 × 8
→ 3.14 × 12 × 8
→ 301.44 m³
We know that
l² = h² + r²
→ 8² + 6²
→ 64 + 36
l² = 100
l = √100
l = 10
Later surface area of cone = πrl
→ 3.14 × 6 × 10
→ 3.14 × 60
→ 188.4 m²
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