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A circular flower bed has diameter 4m. The flower bed is increased so that the diameter is now 12m. How many times larger is the new flower bed?

A circular flower bed has diameter 4m. The flower bed is increased so that the diameter is now 12m. How many times larger is the new flower bed? Correct Answer 9

In case of a circle, Area ∝ (diameter)2 So,   A2/A1  = d22/d12 or,  A2 = d22/d12 x A1                 = 122/42 x A1                 =  9 A1

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