A) d/2
B) d
C) 2d
D) 3d
Correct Answer: D
Solution :
According to the following ray diagram \[HI=AB=d\] and \[DS=CD=\frac{d}{2}\] \[\because \,AH=2AD\]\[\Rightarrow \,\,GH=2CD=\frac{2d}{2}=d\] Similarly\[IJ=d\]so \[GJ=GH+HI+IJ\]\[=d+d+d=3d\]You need to login to perform this action.
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