Quantitative Aptitude ID : 92446

June 29, 2016 Quiz Questions

The length of diagonal of a square is 15\sqrt{2}cm. Its area is :
[A]250 sq.cm.
[B]225 sq.cm.
[C]112.5 sq.cm.
[D]450 sq.cm.

225 sq.cm.
Diagonal of square = \sqrt{2}\times side
\therefore\sqrt{2}\times side = 15\sqrt{2}
=> Side = \frac{15\sqrt{2}}{\sqrt{2}} = 15
∴ Area of square = (side)^{2}
= 15 \times 15 = 225 sq.cm.
Hence option [B] is the right answer.

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