Luas permukaan sebuah tabung adalah 880 cm², sedangkan kelilinv alas tabung itu 44 cm. Hitunglah tinggi tabung tersebut !
Adhi808
22/7 .2r = 44 2r = 44 . 7/22 2r = 14 r = 7 cm 2. 22/7 . 7 .7 + 22/7 . 14 . t = 880 308 + 44t = 880 t = 13 cm
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silvi14
Keliling alas = πd 44 = 3,14 x d d = 44/3,14 d = 14 r = 1/2d r = 1/2 x 14 r = 7 luas permukaan = 2πr ( r + t ) 880 = 2 x22/7 x 7 (7 + t) 880 = 44 x 7t 7t = 880/44 7t = 20 t = 20 - 7 t = 13
2r = 44 . 7/22
2r = 14
r = 7 cm
2. 22/7 . 7 .7 + 22/7 . 14 . t = 880
308 + 44t = 880
t = 13 cm
44 = 3,14 x d
d = 44/3,14
d = 14
r = 1/2d
r = 1/2 x 14
r = 7
luas permukaan = 2πr ( r + t )
880 = 2 x22/7 x 7 (7 + t)
880 = 44 x 7t
7t = 880/44
7t = 20
t = 20 - 7
t = 13