A) 1 sec
B) 6 sec
C) 2 sec
D) 5 sec
Correct Answer: B
Solution :
[b] \[S=ut+\frac{1}{2}g{{t}^{2}}\] \[30=-\,25t+5{{t}^{2}}\] \[6=-\,5t+{{t}^{2}}\] \[{{t}^{2}}-5t-6=0\] \[(t-6)(t+1)=0\] \[t=6\,\sec \]You need to login to perform this action.
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