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प्रश्न
The sides of a triangle are 2x + 3y, x + 5y and 7x – 2y, find its perimeter.
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उत्तर
Sides of a triangle are 2x + 3y, x + 5y, 7x - 2y
∴ Perimeter = sum of three sides of the triangle
= 2x + 3y + x + 5y + 7x - 2y
= 2x + x + 7x + 3y + 5y - 2y
= 10x + 8y - 2x
= 10x + 6y
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