TSD Q3

.  A road network (shown in the figure below) connects cities A, B, C and D. All road segments are straight lines. Dis the mid-point on the road connecting A and C. Roads AB and BC are at right angles to each other with BC shorter than AB. The segment AB is 100 km long. Ms X and Mr Y leave A at 8.00 a.m., take different routes to city C and reach at the same time. X takes the highway from A to B to C and travels at an average speed of 61.875 kmph. Y takes the direct route AC and travels at 45 kmph on segment AD. Y's speed on segment DC is 55 kmph.

 

  Q. The total distance travelled by Y during the journey is   approximately?

  a) 105 km

  b) 150 km

  c) 130 km

  d) Can not be determined 

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