A certain straight corridor has four doors, A, B, C and D (in that order) leading off from the same side. How far apart are doors B and C? The distance between doors B and D is 10 meters. The distance between A and C is 12 meters.  Select
A) 5 B) 4 C) 3 D) 2 E) 1
AB+BC=12 and BC+C2 =10 hence BC=12-AB and BC= 10-C2 hence 12-AB = 10 -C2   AB-C2 = 2 AB-C2 is nothing but BC, hence BC= 2   ANSWER:2
<result>D</result>
A certain straight corridor has four doors, A, B, C and D (in that order) leading off from the same side. How far apart are doors B and C? The distance between doors B and D is 10 meters. The distance between A and C is 12 meters.