Find the total surface area of cone whose radius is r /2 and slant height is 2l
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Answer:
Step-by-step explanation:
given
slant height = 2l
radius = r/2
total surface area of the cone = 2π*radius(radius+slant height)
=2π*r/2[r/2+2l]
=πr{r+4l}/2 sq units
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