The surface area of three dimonsensed face is the sum of all the the surface areas of each of the face given below are the nets
of some solid derive the formula for calculating its curved surface area and total surface area
Please answer the question it's very urgent
1 answer:
Answer:
cylinder:
curved sa = 2πrh
=> rectangle, breath = h, width = perimeter of circle = 2πr
total sa = 2πrh+2πr^2
=> curved sa + area of 2 circles
cone:
curved sa = πrl
=> treated as a triangle, base = circumference of circle, height = slant height
total sa = πr^2+πrl
=> curved sa + area of base (circle)
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