Luas selimut = keliling lingkaran x tinggi
1.760 = 2πr x 28
1.760 = 2x22/7 r x 28
1.760 = 176 x r
r = 10 cm
a. jari-jari = 10cm
b. Luas tabung tanpa tutup
= πr² + luas selimut
= 3,14x100 + 1760
= 314+1760
= 2074 cm²
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Luas selimut = keliling lingkaran x tinggi
1.760 = 2πr x 28
1.760 = 2x22/7 r x 28
1.760 = 176 x r
r = 10 cm
a. jari-jari = 10cm
b. Luas tabung tanpa tutup
= πr² + luas selimut
= 3,14x100 + 1760
= 314+1760
= 2074 cm²