Exemplar Exercise Problems V — task. Mathematics CBSE, Class 9.

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1. The area of an isosceles triangle having base

$2 cm$ and the length of one of the equal sides

$4 cm$ , is

$4 \sqrt{15} cm^2$
$\sqrt{15} cm^2$
$\sqrt{\frac{15}{2}} cm^2$
$2 \sqrt{15} cm^2$

2. The edges of a triangular board are

$6 cm$ ,

$8 cm$ and

$10 cm$ . The cost of painting it at the rate of

$9$ paise per

$cm^2$ is

$Rs 2.16$
$Rs 2.56$
$Rs 2.00$
$Rs 3.00$

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