A) 20 m
B) 30 m
C) 40 m
D) 10 m
Correct Answer: C
Solution :
\[{{Y}_{cm}}\]from ground \[=\frac{0.03\times 100}{0.05}=60\,m\] |
\[{{V}_{cm}}=\frac{0.02\times 100}{0.05}=40\,m/s\] |
\[H=\frac{V_{cm}^{2}}{2g}=\frac{40\times 40}{20}=80\,m\] |
Height above building\[=80-40=40\text{ }m.\] |
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