Mathematics
Grade9
Easy
Question
The length of the whole track is ______.
- 2 m
- 5 m
- 12 m
- 10 m
Hint:
Tracks are parallel and equidistant.
The distance between two parallel lines is the length of any perpendicular segment joining the two lines.
The correct answer is: 10 m
We know that the tracks are parallel i.e. A 
B C D and Line XY is a transversal joining all the parallel lines and perpendicular at the point of intersection.
By property : The distance between two parallel lines is the length of any perpendicular segment joining the two lines.
So, the length of track = 5 × Length of perpendicular height between two parallel tracks
= 5 × 2
= 10 m.
Thus, the length of the whole track is 10m.
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