Question

The round table cover has six equal designs if the radius of the cober is 28 cm fibd the cost of making design at rs 0.35 percm2

Answer 1

radius of circle = 28 cm
area of circle = pie * r square
= 22/7*28*28 = 2464
so, cost for making design = 2464*0.35 = 862.40
862.40 is answer.

Answer 2

Answer:

Step-by-step explanation:

Answer:

Good  night

Step-by-step explanation:

Sum of all angles of triangle = 180°

∠A + ∠B + ∠O = 180°

⇒ 2 ∠A = 180° - 60°

⇒ ∠A = 120°/2

⇒ ∠A = 60°

Triangle is equilateral as ∠A = ∠B = ∠C = 60°

Area of equilateral ΔAOB = √3/4 × (OA)2 = √3/4 × 282 = 333.2 cm2

Area of sector ACB = (60°/360°) × π r2 cm2

                                           = 1/6 × 22/7 × 28 × 28 = 410.66 cm2

Area of design = Area of sector ACB - Area of equilateral ΔAOB

                       = 410.66 cm2 - 333.2 cm2 = 77.46 cm2

Area of 6 design = 6 × 77.46 cm2 = 464.76 cm2

Total cost of making design = 464.76 cm2 × ₹ 0.35 per cm2 = ₹ 162.66  

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