A) \[40\left( \sqrt{2}-1 \right)\]
B) \[40\left( \sqrt{3}-\sqrt{2} \right)\]
C) \[20\sqrt{2}\]
D) \[20\left( \sqrt{3}-1 \right)\]
Correct Answer: D
Solution :
\[\tan 30{}^\circ =\frac{20}{20+x}=\frac{1}{\sqrt{3}}\] |
\[20x=20\sqrt{3}\] |
\[x=20\left( \sqrt{3}-1 \right)\] |
\[\Rightarrow \] Speed is \[20\left( \sqrt{3}-1 \right)\text{m/sec}\] |
You need to login to perform this action.
You will be redirected in
3 sec