Q: 142 (IAS/1994)

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A person at a point D on a straight road AC has four options to go to B which lies on a perpendicular to AC through D.
Which one of the following is the shortest route to B ?
question_subject: 
Maths
question_year: 
1994
question_exam: 
IAS
question_sub_subject: 
Mathematics
question_topic: 
Mathematics
stats: 
0,128,400,112,208,80,128