A) 1
B) 2
C) 3
D) 4
Correct Answer: A
Solution :
Let height of each storey is y meter. \[\therefore \,\,\,H\,\,=\,\,ut\,\,+\,\,\frac{1}{2}g{{t}^{2}}\] \[\therefore \,\,\,9y\,\,=\,\,0+\frac{1}{2}\times 10\times {{3}^{2}}\,\,\Rightarrow \,\,y\,\,=\,\,5\,m\] now for the first sec \[ny=ut\,\,+\,\frac{1}{2}g{{t}^{2}}\] \[ny=0\,\,+\,\,\frac{1}{2}\,\,\times \,\,10\,x\,{{1}^{2}}\,\,\Rightarrow \,\,n=1\]You need to login to perform this action.
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