Find the area of metal sheet required to make two hallow cones each of height = 24 cm and slant height = 25 cm
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l = 25 cm , h = 24 cm
r = √ l²- h²
r = √25² - 24²
r = √625-576
r = √49
r = 7cm
CSA of two hollow cones = 2(πrl)
= 2×22/7×7×25
= 1100 cm²
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