Question

findsurface area of cylinder with cone on top
cylinder height = 45 cm
radius = 30
cone height = 15 cm
radius = 15​

Answer 1

Step-by-step explanation:

S A of Cylinder = 2πr( h + r)

=2[ 30π( 75 )]

=4500( 22/7 )

=14142.9 cm². i)

S A of cone = πr( l + r )

l = √( h²+r²)

l = √(225+225)

l = 21.21 cm

S A of cone = 15π(21.213+15)

= 1707.19 cm². ii)

S A of the object = i) + ii)

= 14142.9 + 1707.19

= 15850.09 cm²