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It costs Rs2200 to paint the …

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It costs Rs2200 to paint the inner curved surface of a cylindrical vessel 10m deep. If the cost of painting is at the rate of Rs20/m²,find :

1)inner curved surface area of the vessel

2)radius of the base

Posted by Sadhna Kashyap 8 years, 9 months ago

Naveen Sharma 8 years, 9 months ago

Ans. Depth/Height of Cylinderical Vessel = 10m

Total Cost =Rs. 2200

Rate of Painting =Rs 20/m²

i) Inner Curved Surface Area Area= 2200/20 = 110m²

ii) As we know

Curved surface area = \(2\pi rh\)

\(=> 2\times {22\over 7}\times r\times 10 = 110\)

\(=> r = {110 \times 7 \over 2\times 22\times 10} = {7\over 4}\)

=> r = 1.75m

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