Question
A copper sphere of diameter 18cm is drawn into a wire of diameter 4 mm Find the length of the wire.
A copper sphere of diameter 18cm is drawn into a wire of diameter 4 mm Find the length of the wire.
Answer: Option B
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Volume of sphere = (((4*22/7)/3) x 9 x 9 x 9 ) cm3 = 972*22/7 cm3
Volume of sphere = (22/7 x 0.2 x 0.2 x h ) cm3
972*22/7 = 22/7 x (2/10) x (2/10) x h
h = (972 x 5 x 5 )cm = [( 972 x 5 x5 )/100 ] m
= 243m
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