Answers

2016-02-28T22:28:59+05:30
R=3.5cm
v=4/3*22/7*(3.5)(3.5)(3.5)
 =359.333333
 =360(approx)
d=m/v
7.8=m/360
m=7.8*360
m=2808g
m=2.808kg
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