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Answer:
x = 6 cm
Step-by-step explanation:
Given ratio of sides of similar figures = a : b , then
ratio of areas = a² : b²
Here ratio of areas = 5 : 45 = 1 : 9 , so
ratio of sides = :
= 1 : 3
Thus side of B is 3 times side of A
x = 3 × 2 = 6 cm