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Q.

A man from top of a 100 meters high tower sees a car moving towards the tower at an angle of depression of Question Image. After some time, the angle of depression becomes Question Image. The distance (In meters) travelled by the car during this time is:


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a

Question Image

b

Question Image

c

Question Image

d

Question Image 

answer is B.

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Detailed Solution

Concept- Height is indeed the measurement of an object in the vertical direction, while distance is really the measurement of an object in the horizontal direction from a specific point.
imageIn Question Image,
Question ImageQuestion ImageIn Question Image,
Question ImageQuestion ImageQuestion ImageTherefore, the distance travelled by the car during this time is Question Image.
Hence, the correct answer is option (2).
 
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