Bunuel wrote:

A circular garden is surrounded by a fence of negligible width along the boundary. If the length of the fence is 1/2 of th area of the garden. What is the radius of the circular garden?

A. 1

B. 2

C. 4

D. 8

E. 16

Formula based question and test takers should be able to complete such questions in less than 60 sec.

Length of the fence = length of the circular garden = circumference of the circular region = 2πr

According to the condition, length of the fence is 1/2 of the area of the garden (πr^2)

Therefore, 2πr = 1/2 x (πr^2)

Solving the above equation, r = 4

Hence, the answer is option C. 4

Tip: Always write what you're solving for. Sometimes questions ask you to find diameter, or some other value. Do no blindly solve such each questions because there're some deadly traps

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