find slant height
curved surface area
tsa
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exercise 13.2 example 5 answer
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l=?,r = 12cm , h = 16cm
l^2= r^2 + h^2
l^2= 12 ^2 + 16 ^2
l^2= 144 + 256
l^2= 400
by taking square root
l = 20
c.s.a of cone =
pi × r × l
3.14 × 12 × 20
753.6 cm^2
t.s.a of cone
pi × r (r + l)
3.14 × 12 (12+20)
37.68×32
1205.76cm^2
l^2= r^2 + h^2
l^2= 12 ^2 + 16 ^2
l^2= 144 + 256
l^2= 400
by taking square root
l = 20
c.s.a of cone =
pi × r × l
3.14 × 12 × 20
753.6 cm^2
t.s.a of cone
pi × r (r + l)
3.14 × 12 (12+20)
37.68×32
1205.76cm^2
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