Question

. The cost of painting the sign board at an rate of Rs 4 per cm?, which is in the shape of an equilateral tringle with side 90 cm each, is (take V3 = 1.73) (a) 14015 (b) 14013 (C) 14000 (d) 14100​

Answer 1

Answer:

option b) - 14013

Step-by-step explanation:

formula for area of an equilateral triangle = √3/4 into side²

so area = √3/4 × 90² = (1.73 × 8100)/4 = 14013/4 cm²

cost per cm² = Rs 4

cost to paint the whole signboard = 14013/4 × 4 = Rs 14013

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