Lake or pond

The landlord has a square lake. Trees grow around this lake. The lake wants to enlarge the pond twice and not cut down or flood any trees.

How will he do that?

Correct answer:

x =  0

Step-by-step explanation:

S1=a2 S2 = π r2  2   S1 = S2  2   a2 = π r2  r= a   2/π  h2 = 2   h1 x=0

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