a solid is composed of cylinder with hemispherical ends . if the whole length of the solid is 100cm and the diameter of the hemispherical ends
is 28 cm . find the volume of the solid .(hint :- h of cylinder = 100-14-14 =72 cm )
Answers
Answered by
1
In the given solid height of cylinder = 100 - 2{radius of hemisphere} = 100 - 28 = 72
CSA of the solid = CSA of cylinder + CSA of both hemispheres
= 2*22/7*14*72 + 2 { 2*22/7*14*14 }
= 8800cm2
Cost = 8800 * .05 = Rs 440
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Answered by
0
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.855.36Rs
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