LP Tabung tanpa tutup = π r(r + 2t) LP Tabung tanpa tutup = 22/7 * 7(7 + 2 · 20) LP Tabung tanpa tutup = 22(7 + 40) LP Tabung tanpa tutup = 22(47) LP Tabung tanpa tutup = 1.034 cm^2
LP Total = 1.122 cm^2 + 1.034 cm^2 LP Total = 2.156 cm^2
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Maulany
Luper 1 = tabung ->tanpa tutup d = 14 , r = 7 = pi . r ( r + 2t) = 22/7 . 7 ( 7 + 2.20) = 22 ( 7 + 40) = 22 . 47 = 1034 cm²
luper 2 = kerucut -> tanpa alas, berarti hanya luas selimut s = 25 cm -> dari tripel pythagoras 7,24,25 = pi . r .s = 22/7 . 7 . 25 = 550 cm²
LP kerucut = 2 * 22/7 * 7(7 + 22)
LP kerucut = 44(29)
LP kerucut = 1.276 cm^2
LP selimut kerucut = LP kerucut - L Alas
LP selimut kerucut = LP kerucut - (π r^2)
LP selimut kerucut = 1.276 cm^2 - (22/7 * 7 * 7)
LP selimut kerucut = 1.276 cm^2 - 154 cm^2
LP selimut kerucut = 1.122 cm^2
LP Tabung tanpa tutup = π r(r + 2t)
LP Tabung tanpa tutup = 22/7 * 7(7 + 2 · 20)
LP Tabung tanpa tutup = 22(7 + 40)
LP Tabung tanpa tutup = 22(47)
LP Tabung tanpa tutup = 1.034 cm^2
LP Total = 1.122 cm^2 + 1.034 cm^2
LP Total = 2.156 cm^2
d = 14 , r = 7
= pi . r ( r + 2t)
= 22/7 . 7 ( 7 + 2.20)
= 22 ( 7 + 40)
= 22 . 47
= 1034 cm²
luper 2 = kerucut -> tanpa alas, berarti hanya luas selimut
s = 25 cm -> dari tripel pythagoras 7,24,25
= pi . r .s
= 22/7 . 7 . 25
= 550 cm²
luper seluruhnya =
1034 + 550 = 1584 cm²
**maaf kalau salah