Answer:
720 cm²
Step-by-step explanation:
Given 2 similar cylinders with ratio of height = a : b , then
ratio of areas = a² : b²
Here ratio of heights = 1 : 2 , then
ratio of area = 1² : 2² = 1 : 4 , that is
Surface area of B is 4 times surface area of A
surface area of B = 4 × 180 = 720 cm²