A) 5
B) 6
C) 10
D) 20
Correct Answer: A
Solution :
\[\Delta QPA:\frac{h}{x+y}=\tan {{30}^{o}}\Rightarrow \sqrt{3}h=x+y\] ?(1) \[\Delta QPB:\frac{h}{y}=\tan {{60}^{o}}\Rightarrow h=\sqrt{3}y\] ?(2) By (i) and (ii) : \[3y=x+y\Rightarrow y=\frac{x}{y}\] \[\therefore \]speed is uniform Distance x in 10 mins \[\Rightarrow \]Distance\[\frac{x}{2}\]in 5 minsYou need to login to perform this action.
You will be redirected in
3 sec