Diketahui r = 20/2 = 10 cm, dan t = 21 cm.
V arsir = V tabung - V kerucut
= πr²t - 1/3 πr²t
= (1 - 1/3)πr²t
= 2/3 πr²t
= 2/3 x 3,14 x 10² x 21
= 2 x 314 x 7
= 4396 cm³
∴ Volume bangun yang diarsir adalah 4396 cm³.
volume arsir
πrrt - ⅓πrrt
(1 - ⅓ ) x 3,14 x 10 x 10 x 21
2/3 x 314 x 21
2 x 314 x 7
628 x 7
4.396 cm³
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Verified answer
Volume Bangun Ruang
Diketahui r = 20/2 = 10 cm, dan t = 21 cm.
V arsir = V tabung - V kerucut
= πr²t - 1/3 πr²t
= (1 - 1/3)πr²t
= 2/3 πr²t
= 2/3 x 3,14 x 10² x 21
= 2 x 314 x 7
= 4396 cm³
∴ Volume bangun yang diarsir adalah 4396 cm³.
volume arsir
πrrt - ⅓πrrt
(1 - ⅓ ) x 3,14 x 10 x 10 x 21
2/3 x 314 x 21
2 x 314 x 7
628 x 7
4.396 cm³