Question

A storage tank consists of a circular cylinder with a hemisphere stuck on either end. If the external diameter of the cylinder is 1.4m and its length be 8m. find the cost of painting it on the outside at rate of 20 per m²... answer it fast please

Answer 1

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Answer 2

Answer:

Total cost of painting the box on the outside = Rs. 827.20

Step-by-step explanation:

Diameter of the cylinder = 1.4 m

So, Radius of the cylinder = 0.7 m

Height of the cylinder = 8 m

Total Area which is to be painted = 2πrh + 2πr² × 2

$Area = 2\times\frac{22}{7}\times 0.7\times 8+2\times\frac{22}{7}\times 0.7^2\times2\\\\Area = 35.2 + 88\times 0.07\\\\\implies Area = 35.2 + 6.16\\\\\implies Area = 41.36\text{ square meter}$

Cost of painting = Rs. 20 per square meter

So, Total cost of painting the box on outside = 41.36 × 20

Hence, Total cost of painting the box on the outside = Rs. 827.20