A solid is composed of a cylinder with hemispherical ends. If the whole length of the solid is 45 cm and the radius of each hemispherical end is 10.5 cm, find volume and surface area of the solid.
Answers
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× 22/7
×18×(72+36)cm 2
=12219.42cm 2
Rate of polishing 7 paise per sq.cm
Costofpolishing=Rs(12219.42×7/100)=855.36Rs
Similar questions