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CBSE Class 9 Answered

The slant height of a cone is increased by 10 %. If the radius remains the same, find the increase (in %) in the the Curved Surface Area.
Asked by mandaokar | 17 Feb, 2018, 09:38: PM
answered-by-expert Expert Answer
begin mathsize 16px style CSA subscript 1 equals πrl subscript 1 CSA subscript 2 equals πrl subscript 2 straight l subscript 2 equals 1.1 straight l subscript 1 CSA subscript 1 over CSA subscript 2 equals πrl subscript 1 over πrl subscript 2 equals straight l subscript 1 over straight l subscript 2 equals fraction numerator straight l subscript 1 over denominator 1.1 straight l subscript 1 end fraction equals fraction numerator 1 over denominator 1.1 end fraction CSA subscript 2 equals 1.1 CSA subscript 1 10 percent sign space increase end style
Answered by Arun | 18 Feb, 2018, 02:05: PM

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CBSE 9 - Maths
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