Question

HITUNGLAH LUAS PERMUKAAN TABUNG JIKA DI KETAHUI :

1. JARI JARI = 14 DAN TINGGI = 10
2. DIAMETER = 21 DAN TINGGI = 12
3. jari jari = 7 tinggi = 7

Answer 1

1.
Lp=2πr(r+t)
==2×22/7×14(14+10)
=44×2(24)
=88(24)
=2112

2.
d=21➡r=21:2=10,5
Lp=2πr(r+t)
=2×22/7×10,5(10,5+12)
=66(22,5)
=1485

3.
Lp=2πr(r+t)
=2×22/7×7(7+7)
=44(14)
=616

Answer 2

1.)lp tabung = 2*22/7*14(14+10)
88*140=12320
2.)lp tabung = 2*22/7*10,5* (10,5+12)
66*12,5=825
3.) lp tabung = 2*22/7*7 (7+7)
44*14=616
nb= (*)dikali