A) \[4s\]
B) \[3s\]
C) \[2s\]
D) \[1s\]
Correct Answer: A
Solution :
\[h=-ut+\frac{1}{2}g{{t}^{2}}\]\[40=-10t+\frac{1}{2}\times 10\times {{t}^{2}}\Rightarrow t=4\,\,s\]You need to login to perform this action.
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