Question

a hemisphere dome of a building is to be painted . The circumference of the base of the dome is 17.6 .Find the cost of painting it at the rate of Rs.5 per 100 cm square

Answer 1

Hey there !!

Circumference of base of the dome = 17.6 m

2πr = 17.6

=> 2 × 3.14 × r = 17.6

=> r = 17.6 / 6.28

=> r = 2.8m

Cost of painting = Rs. per 100 sq cm
Total cost of painting = (492800 × 5) / 100
Total cost of painting = Rs. 24640