Question

Find the area of metal sheet required to make two hallow cones each of height = 24 cm and slant height = 25 cm

Answer 1

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