volume tabung 1.848dm^3, jika jari jari alasnya 7 dm. hitunglah luas selimut tabung

V = 1848 dm^3
r = 7 dm
L selimut tabung = ?

L selimut tabung = K sisi lingkaran × t

V = pi × r^2 × t
1848 = 22/7 × 7^2 × t
1848 = 22/7 × 49 × t
1848 = 22 × 7 × t
1848 = 154 × t
1848 : 154 = t
t = 12 dm

L selimut tabung = K sisi lingkaran × t
L selimut tabung = K sisi lingkaran × 12

K lingkaran = pi × diameter {diameter = r × 2}
K lingkaran = 22/7 × (7 × 2)
K lingkaran = 22/7 × 14 = 44 dm

L selimut tabung = K sisi lingkaran × t
L selimut tabung = 44 × 12
L selimut tabung = 528 dm^2