TSD Q4
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. What is the length of the road segment BD?
a) 50 km
b) 52.5 km
c) 55 km
d) Can not be determined
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