A hemispherecall dome of bulding needs painted.if the area of the base is 24.64 m square , find the cost painting it given the cost of is rupees 5per 100cm square
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A hemispherecall dome of bulding needs painted.if the area of the base is 24.64 m square , find the cost painting it given the cost of is rupees 5per 100cm square
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Circumference of circle = 2πr
⇒ 17.6 = 2*22/7*r
⇒ 44r = 17.6*7
⇒ r = 123.2/44
⇒ Radius = 2.8 m or 280 cm
Now, Curved surface area of the hemisphere = 2πr²
⇒ = 2*22/7*280*280
⇒ = 3449600/7
⇒ = 492800 sq cm
Cost of painting = Rs. per 100 sq cm
Total cost of painting = (492800*5)/100
Total cost of painting = Rs. 24640
Circumference of circle = 2πr
⇒ 17.6 = 2*22/7*r
⇒ 44r = 17.6*7
⇒ r = 123.2/44
⇒ Radius = 2.8 m or 280 cm
Now, Curved surface area of the hemisphere = 2πr²
⇒ = 2*22/7*280*280
⇒ = 3449600/7
⇒ = 492800 sq cm
Cost of painting = Rs. per 100 sq cm
Total cost of painting = (492800*5)/100
Total cost of painting = Rs. 24640