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luas selimut tabung = 2πrt = 2. 22/7.7.24 = 1056 cm²
luas permukaan kerucut =
sisi = √24²+7² = √576 +49 = √625 = 25
luas selimut kerucut = πrs = 22/7 x 7 x 25 = 550 cm²
jadi luas permukaan bangun tersebut = 308 +1056 + 550 = 1914cm²
s = 25 >>> Tripel phitagoras
Lp = L stengah bola + L selimut tabung + L selimut kerucut
= 2 . π . 7 . 7 + 2 . π . 7 . 24 + π . 7 . 25
= 98 π + 336 π + 175 π
= 609 π
= 1914 cm²