Question

base radius and height of a right circular cone are 8 cm and 6 CM respectively find its volume surface area and total surface area

Answer 1

r = 8 cm

h = 6 cm

Volume = 1/3 πr²h

             =  1/3 × 22/7× 8×8×6 = 401.92 cm³

T.S.A = πr (l + r)       [l = √8²+6² = √100 = 10 cm]

      =  8π( 10+8)

     = 8π × 18  452.16 cm²

OK

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THANKS.

Answer 2

Volume of a right circular cone=1/3π r^2 h

=1/3*22/7*8*8*6

=402.28cm^3

T.s.a of cone =(c.s.a+area of circle)of cone

=(πrl+πr^2)

First of all we have to find slant heigh(l)

l=(r^2+h^2)1/2

=(8*8+6*6)1/2

=(64+36)1/2

=10cm

T.s.a of cone =(22/7*8*10)+(22/7*8*8)

=(251.42+201.14)

=452.56cm^2

Hence your solution is completed !