A) 60 m/s
B) 65 m/s
C) 70 m/s
D) 75 m/s
Correct Answer: A
Solution :
For downward motion. \[u=-20\text{ }m/s\] \[{{v}^{2}}={{u}^{2}}+2gh\] \[={{(-20)}^{2}}+2\times 10\times 200\] \[v=60\text{ }m/s\]
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