Bus stop is barricaded from the remaining part of the road, by using 50 hollow cones made of recycled cardboard. Each cone has a base diameter of 40 cm and height 1 m. If the outer side of each of the cones is to be painted and the cost of painting is 12 per m2 , what will be the cost of painting all these cones? (use π = 3.14 and take 1.04 = 1.02)
Answers
Cost of painting 50 cones is Rs. 384.33
Step-by-step explanation:
Given :
Height of cone = 1 m
Base Diameter = 40 cm
∴ Radius =
= .2 m
Consider l as the slant height
l² = h² + r²
l² = (1)² + (0.2)²
l² = 1 + 0.04 = 1.04
Taking square toot on both sides we get,
l = √1.04 = 1.02 m
Curved surface area of 1 cone = πrl
= 3.14 x 0.2 x 1.02 m²
= 0.64056 m²
Total curved surface area of 50 cones = 50 x 0.63056 = 32.028 m²
Cost of painting = 12 per m²
Total cost of painting 50 cones = 12 x 32.028 = Rs. 384.33
To Learn More....
1. Yhe total surface area of cone is 71.28 cm2 find the volume of its cone if the diameter of base 5.6cm
https://brainly.in/question/8394949
2. The curved surface area of cone is 670 CM square and its radius is 15 CM then its total surface area is
https://brainly.in/question/5064128
Answer:
hope it helps ☺️☺️☺️......
