A) 330m
B) 495m
C) 660m
D) 990m
Correct Answer: B
Solution :
Let\[{{s}_{1}}\]and\[{{s}_{2}}\]be the distances of man from either side of valley, then \[2{{s}_{1}}=v{{t}_{1}}\]and\[2{{s}_{2}}=v{{t}_{2}}\] \[\Rightarrow \]\[2({{s}_{1}}+{{s}_{2}})=v({{t}_{1}}+{{t}_{2}})\] \[\Rightarrow \]\[{{s}_{1}}+{{s}_{2}}=\frac{v({{t}_{1}}+{{t}_{2}})}{2}\] \[\therefore \] \[d={{s}_{1}}+{{s}_{2}}=\frac{330\times (1+2)}{2}\] \[\Rightarrow \] \[d=\frac{330\times 3}{2}=495\,m\]You need to login to perform this action.
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