A) 100 m
B) 122.5 m
C) 145 m
D) 167.5 m
Correct Answer: B
Solution :
Let h distance is covered in n sec \[\Rightarrow h=\frac{1}{2}g{{n}^{2}}\] ?(i) Distance covered in \[{{n}^{th}}\]sec\[=\frac{1}{2}g(2n-1)\] \[\Rightarrow \frac{9h}{25}=\frac{g}{2}(2n-1)\] ?(ii) From (i) and (ii), \[h=122.5\ m\]
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