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
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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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