SOLUTION: From a cylindrical object of diameter 70cm and height 84cm , a right solid cone having its base as one of the circular ends of the cylinder and height 84cm is removed. Calculate

Algebra ->  Surface-area -> SOLUTION: From a cylindrical object of diameter 70cm and height 84cm , a right solid cone having its base as one of the circular ends of the cylinder and height 84cm is removed. Calculate      Log On


   



Question 795758: From a cylindrical object of diameter 70cm and height 84cm , a right solid cone having its base as one of the circular ends of the cylinder and height 84cm is removed.
Calculate :
A) the volume of the remaning solid object , expressing your answer in the form a X 10n (10 raised to power n) where 1 B) the surface area of the remaining solid object

Answer by Alan3354(69443) About Me  (Show Source):
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From a cylindrical object of diameter 70cm and height 84cm , a right solid cone having its base as one of the circular ends of the cylinder and height 84cm is removed.
Calculate :
A) the volume of the remaning solid object , expressing your answer in the form a X 10n (10 raised to power n) where 1 Vol of the cylinder = pi%2Ar%5E2%2Ah
Vol of the cone = pi%2Ar%5E2%2Ah%2F3
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B) the surface area of the remaining solid object
The area of one end is pi%2Ar%5E2
The lateral area = pi%2Ad%2Ah
The inner surface = the lateral area of the cone
Slant height = sqrt%2884%5E2+%2B+35%5E2%29+=+91 cm
Area = pi*r*SH