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Q.

A solid is in the form of a right circular cylinder, with a hemisphere at one end and a cone at the other end.   The radius of the common base is 3.5cm, and the height of the cylinder and conical portions are 10cm and 6cm respectively. find the total surface area of the solid.

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a

373.3cm2

b

347.3cm2

c

39.8cm2

d

None 

answer is A.

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Detailed Solution

Height of the cylindrical part and Cone are 10 cm and 6cm respectively. Radius of cone, cylinder and hemi-sphere = 3.5cm. r = 3.5cm for both cylinder and Cone.
The area of Canvas required = Surface area of hemisphere, cylinder and lone parts of tentQuestion ImageQuestion ImageA = 373.3 cm2
 
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