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7536:40=188,4
2. tinggi ama tinggi? gasalah soal?
l. selimut = 2phi × r × t
7536 = 2(3.14) × r × 40
r = 7536/251.2
r = 30 cm
volume = l.alas × tinggi
volume = phi × r^2 × t
volume = 3.14 × 30 × 30 × 40
volume = 113040 cm3
b. t = 2.1; r=8.5
volume = phi × r^2 × t
volume = 3.14 × 8.5 ×8.5 × 2.1
volume = 476.4165 cm3