Question

if TSA of a cone of radius is 7cm is 704cm^2 then find the slant height
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Answer 1

Answer:

TSA of cone = πr²+πrl or πr (r+l)

π= 22/7

r = 7cm

TSA = 704cm²

l = ?

TSA of cone = πr(r+l)

704= 22/7 ×7 ( 7+ l)

704 = 22 (7+l)

704/22= 7+l

32 = 7+l

32-7 =l

25 = l

so slant height of cone is 25cm