Question

a block is made of 2 solids
a cube and a hemisphere the base of the block is the cube with edge of 7cm and hemisphere attached attached on the top has a diameter of 4.9 CM if the block is to be painted find the TSA to be painted

Answer 1

The edge of the cube,(a) = 7 cm

Radius of the hemisphere, (r) = 2.45 cm

So total surface area of the block is-

=Surface Area of cube + Curved surface area of hemisphere - Area of base of hemisphere

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Answer 2

Step-by-step explanation:

The edge of the cube,(a) = 7 cm

Radius of the hemisphere, (r) = 2.45 cm

So total surface area of the block is-

=Surface Area of cube + Curved surface area of hemisphere - Area of base of hemisphere

6pir^2+2pir^2-pir^2

6(49)+22/7*2.45*2.45

294+ 18.86

=312.86

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