The diameter of two cones are equal.if their slant heights are in the ratio 5:4,find the ratio of their curved surface area
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2
Answer:
ri: r2=1:1
I1: I2=5:4
CSA = πrl
πx1x5:πx1x4
Ratio of CSA=5:4
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Diameter of two cones are equal.
Slant heights are in the ratio of 5 : 4
=> l₁ : l₂ = 5 : 4
C.S.A of first cone/C.S.A of second cone
=> πrl₁/πrl₂
=> (r₁/r₂) * (l₁/l₂)
=> 5/4
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