The edges of a triangular board are 6cm,8cm and 10cm . The cost of painting it at the rate of 70 paise per cm² is *
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Solution : (b) Since, the edges of a trianglular board are a = 6 cm, b=8 cm and c=10 cm. Now, semi-perimeter of a triangular board. Hence, the cost of triangular board is rupee 2.16.
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(b) Since, the edges of a trianglular board are a = 6 cm, b=8 cm and c=10 cm. Now, semi-perimeter of a triangular board. Hence, the cost of triangular board is rupee 2.16.
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