Jawabanmu

2014-09-07T02:05:33+07:00
1. l.selimut : tinggi = kel lingkaran
    7536:40=188,4
2. tinggi ama tinggi? gasalah soal?
no 2 maksudnya jari jari 8,5 tinggi 2,1
bisa di jelaskan secara detail ndk
2014-09-07T06:19:38+07:00
1. luas selimut = 7536; tinggi = 40
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