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Lp = 3520 cm²
r = 14 cm
π = 22/7
Ditanya :
t =.... ?
Jawab:
Lp tab = 2πr² + 2πrt
3520 = 2πr (r+t)
3520 = 2.22/7. 14 (14+t)
3520 = 2. 22. 2 (14+t)
3520 = 88. (14+t)
(14+t) = 3520/88
14+t = 40
t = 40 - 14
t = 26 cm
jadi tinggi tabung tsb ialah 26 cm