④ A right circular cylinder of radius R = 7cm just encloses a sphere (see Fig.). Find
(i) surface area of the sphere, (ii) curved surface area of the cylinder
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Answer:
1. 616 cm sq.
2.
Step-by-step explanation:
1. radius of sphere = 7 cm
surface of the sphere = 4 pie R SQ.
=4 multiply by 22 by 7 into 7 sq.
= 616 cm sq.
2. diameter of sphere = height of cylinder = 14 cm
curved surface area of cylinder = 2 pie r h
= 2 into 22 by 7 into 7 into 14
=616 cm sq.
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