Question

find the cost of whitewashing the outer surface of a cylinder tank of height 10m and diameter 7m at the rate of 2 per meter square​

Answer 1

Answer:

TSA:2×22/7×3.5(10+3.5)

= 11×13.5

= 148.5

cost of whitewashing = 148.5 × 2

= ₹297

Answer 2

Answer: The cost of whitewashing the outer surface of a cylinder tank of height 10m and diameter 7m at the rate of 2 per meter square​ is Rs 440.

Step-by-step explanation:

given : diameter = 7m

Radius = Diameter/2

          = 7/2

           = 3.5m

height = 10 m

Formula of the outer surface area of cylinder is $2\pi rh$.

so , outer surface area of cylinder = $2\pi rh$.

⇒ $2\pi rh$.

⇒ 2 × 22/ 7 × 3.5×10

= 220 m²

The cost of whitewashing  the outer surface of a cylinder tank is 2m²

= 220 × 2

= Rs 440

Hence from the above explaination ,The cost of whitewashing the outer surface of a cylinder tank of height 10m and diameter 7m at the rate of 2 per meter square​ is Rs 440.

To know more about cylinder from the given link

https://brainly.in/question/55461913

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https://brainly.in/question/55612098

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