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A rhombus-shaped sheet with perimeter 40cm …

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A rhombus-shaped sheet with perimeter 40cm and one diagonal 12cm, is painted on both sides at the rate of rupees5 per cmsq. . Find the cost of painting.

Posted by Ishika Kumari 5 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 2 months ago

Given, Perimeter of rhombus =40cm

All sides of rhombus are equal, hence, side, a= 40/4 =10cm
Diagonal of rhombus, p=12cm

Area of rhombus =1/2 p √4a²−p²
Area of rhombus =1/2 (12)√4(10)²−12²

Area of rhombus =96 cm²
Total area of both the sides = 2 × 96=192cm²
Cost of painting 1cm² = Rs. 5
Cost of painting 192cm²= 192 × 5= Rs. 960

1Thank You

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