Question
Sun February 12, 2012 By:
 

A wooden article was made by scooping out a hemisphere from each end of a cylinder. If the height of the cylinder is 15cm, and the base is of diameter 14 cm, find the total surface area of the article when it is ready.

Expert Reply
Mon February 13, 2012
Total surface area of the given solid = CSAcylinder + CSAboth hemispheres
 = (2pie*r*h) + 2(2pie*r*r)
= 2 * pie * 7 * 15 + 2*2*pie*7*7
= 660 + 616
= 1276cm2
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