Question

Find CSA TSA & VOIUME OF CONE OF RADIUS IS 7CM HEIGHT IS 24

Answer 1

slant height =25

radius=7 l2=H2+r2

height=24 =(24×24)+(7×7)

Base Perimeter= 2πr =576+49

=2×π×7=14π l2=625

BaseArea=πr2 l=√625 =25

=π×7×7=49π

CSA

CSA1/2×Baseperimeter×slant height= πrl

1/2×14π×25= 350÷2 = 175π

TSA

Basearea×CSA= πr(r+l)

π×7×(7+25)

π×7×32

225π

VOLUME

1/3×Basearea×height= πr2h/3

π×(7×7)×24/3

π×49×24/3

π×1176/3

392π

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