A) 26 m
B) 24 m
C) 12 m
D) 6 m
Correct Answer: C
Solution :
Volume of solid sphere \[=\frac{4}{3}\pi {{r}^{3}}=\frac{4}{3}\pi {{(0.3)}^{3}}\] cubic metre If the radius of the circular sheet be R, then Volume of the sheet \[=\pi {{R}^{2}}\times 0.001\] \[\therefore \] \[\pi {{R}^{2}}\times 0.001\] \[=\frac{4}{3}\pi {{(0.3)}^{3}}\] \[\Rightarrow \] \[{{R}^{2}}=\frac{4}{3}\times \frac{0.027}{0.001}=36\] \[\Rightarrow \] \[R=\sqrt{36}=6\,m\] \[\therefore \] Diameter \[=2R=12\,m\]
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