Question

. If the base of a rectangle is increased by 10%, by how much % the
corresponding altitudes should decrease so that the area remains
unchanged ?​

Answer 1

Answer:

% dec = 10*100/110 = 100/11 = 9(1/11) (Ans)

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Answer 2

Answer:

Step-by-step explanation:

when you increase the length of the side 10% the area increases by  square of 10% so we have:

$S_{1}*\frac{121}{100}=S_{2}$

so you should multiply $S_{2}$ by $\frac{100}{121}$ to have the first area again