Question

3. A cylinder is closed at both the ends by 12 cm high cones. The radius of the cylinder is 5

cm and total height of the combined article is 41 cm. Find the total surface area of this

article. (  = 3.14 )​

Answer 1

Answer:

For all figures,

r=7 cm

l (slant height)= h (height of cylinder)=4 cm

T.S.A of the figure= C.S.A of Cone+C.S.A of cylinder +C.S.A of hemisphere.

CSA of cone: πrl=(3.14)×(7cm)×(4cm)=87.92 cm

2

CSA of cylinder: 2πrh=(2)×(3.14)×(7cm)×(4cm)=175.84 cm

2

CSA of hemisphere: 2πr

2

=(2)×(3.14)×(7cm)

2

=307.72 cm

2

Adding all: TSA of figure= 571.48 cm

2

Answer 2

Answer:

Step-by-step explanation: