Math, asked by pottiswetha06, 7 months ago

A solid composed of a cylinder with the hemisphere end whole lenght 108cm diameter of 36cm.find the cost of the polish surface of a solid 7 pi sq m​

Answers

Answered by pranayasahu
0

Answer:

PLS MARK AS BRAINLIEST

Step-by-step explanation:

radius of the cylinder =r

1

=18cm

height of the cylinder h=72cm

total surface area

= curved surface are of the cylinder + surface areas of hemispherical ends

=(2πrh+2×2πr

2

)cm

2

=(2πrh+4πr

2

)cm

2

=2πr(h+2r)cm

2

=2×

7

22

×18×(72+36)cm

2

=12219.42cm

2

Rate of polishing 7 paise per sq.cm

Cost of polishing =Rs.(12219.42×

100

7

)

=Rs.855.36

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