if the radius and slant of a cone are in the ratio of 7:13 and it's curved surface area is 286cm²find its radius
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lasya12:
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radius=7x
slant height=13x
c.s.a.= 286sq.cm
csa of cone =pi*r*l
286 =22/7*7x*13x
286=22/7*91x
286*7/22=91x
91=91x
x=1
r=7*1
=7
slant height=13x
c.s.a.= 286sq.cm
csa of cone =pi*r*l
286 =22/7*7x*13x
286=22/7*91x
286*7/22=91x
91=91x
x=1
r=7*1
=7
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