Question

A hemispherical dome of a stupa needs to be painted if the circumference of the dome is 17.6 m find the cost of painting it , given the cost of painting ₹5 per 100cm square

Answer 1

You have not mentioned about the unit of the circumference of the base of the dome. So, I have considered it in meters.

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

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Answer 2

hope u find this answer helpful