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แบบฝกหัดที่ 4
1. จงหาปริมาตร และพื้นที่ผิวทั้งหมดของกรวยกลมที่สูง 24 เซนติเมตร มีเสนผานศูนยกลาง 14 เซนติเมตร
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2. จงหาปริมาตรและพื้นที่ผิวทั้งหมดของกรวยกลมที่สูงเอียง 5 เซนติเมตร มีเสนผานศูนยกลาง 8 เซนติเมตร
(ตอบในรูป )
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3. จงหาปริมาตรจรวดทรงกระบอกมีปลายเปนกรวย มีเสนผานศูนยกลาง 14 เซนติเมตร ความยาว
ทรงกระบอก 30 เซนติเมตร ความสูงยอดกรวย 12 เซนติเมตร
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