Question

a hemispherical dome is to be painted if the circumference of the base of the dome is 17.6 m find the cost of painting it. given the cost of painting is rs 5 per 100 cm²​

Answer 1

Answer:

$Rs. \: 24640$

Step-by-step explanation:

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