Plis besok dikympulin Volume kerucut dibawah adalah………………… No 3,4,5
Jawab:
3.) V = ¹/₃ x πr²t
= ¹/₃ x 3,14 x 10,5 cm x 10,5 cm x 24 cm
= ¹/₃ x 32,97 cm x 10,5 cm x 24 cm
= ¹/₃ x 346,185 cm² x 24 cm
= ¹/₃ x 8.308,44 cm³
= 2.769,48 cm³ ( disederhankan )
= 2.769 cm³
4.) V = ¹/₃ x πr²t
= ¹/₃ x ²²/₇ x 7 cm x 7 cm x 21 cm
= ¹/₃ x 22 cm x 7 cm x 21 cm
= ¹/₃ x 154 cm² x 21 cm
= ¹/₃ x 3.234 cm³
= 1.078 cm³
5.) V = ¹/₃ x πr²t
= ¹/₃ x 3,14 x 7,5 cm x 7,5 cm x 20 cm
= ¹/₃ x 23,55 cm x 7,5 cm x 20 cm
= ¹/₃ x 176,625 cm² x 20 cm
= ¹/₃ x 3.532,5 cm³
= 1.177,5 cm³ ( disederhanakan )
= 1.178 cm³
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Rumus Volume kerucut : ¹/₃ x πr²t
- π = pi [ bernilai 22/7 atau bisa juga 3,14 (Khusus lingkaran)]
- r = jari-jari lingkaran ( setengah dari diameter )
- t = tinggi
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