What is the total surface area of a cone whose radius is 2r and slant height is 1/2
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total surface area= πr(l+r)
=π×2r( 1/2+2r)
=π×r+4r
= 22r/7+4r
=50r/7 cm^2
=π×2r( 1/2+2r)
=π×r+4r
= 22r/7+4r
=50r/7 cm^2
shivanya26:
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