A) 24 cm
B) 42 cm
C) 40 cm
D) 20 cm
Correct Answer: A
Solution :
Side of one square \[=\frac{40}{4}=10\,\,\text{cm}\][\[\because \]Perimeter = 4 \[\times \]Side] |
Side of other square \[=\frac{32}{4}=8\,\,\text{cm}\] |
According to the question, |
Area of third square |
\[={{(10)}^{2}}-{{(8)}^{2}}=100-64=36\,\text{sq}\,\,\text{cm}\] |
\[\therefore \]Side of, third square \[=\sqrt{36}=6\]cm |
\[\therefore \]Its perimeter \[=4\times 6=24\]cm |
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