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r= 6 dm
t= 16 dm
Luas permukaan Tab A = LA = π r ( r + 2t)
LA = π. 6(6 +32)= 228 π
Tabung B
r= 8 dm
t =20 dm
Luas permukaan Tab B = LB = π r( r + 2t)
LB = π 8(8+40) = 384 π
LA : LB = 228 π : 384 π = 3 : 4