An algebra problem by akash dhasmana

Algebra Level 3

. A bus stop is barricaded from the remaining part of the road, by using 50 hollow cones made of recycled cardboard. Each cone has a base diameter of 40 cm and height 1 m. If the outer side of each of the cones is to be painted and the cost of painting is ` 12 per m2, what will be the cost of painting all these cones? (Use π = 3.14 and take 1.04 = 1.02) ANSWER IN APPROX VALUE


The answer is 384.34.

Akash Dhasmana by akash dhasmana , 20, India

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1 solution

Unstable Chickoy
Jun 11, 2014

Total Area

A = π ( 10 0 2 ) ( 40 π 200 π ) = 2000 π c m 2 A = \pi(100^2)(\frac{40\pi}{200\pi}) = 2000\pi cm^2

C o s t = 2000 π 100 × 12 × 50 = 377 Cost = \frac{2000\pi}{100} \times 12 \times 50 = \boxed{377}

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