Image of an object approaching a convex mirror of radius of curvature 20 m along its optical axis is observed to move from {25}/3 m to 4{50}/7 m in 30 s. What is the speed of the object in km per hour? [JEE Adv 2010 P2]

IIT JEE Advanced 2010 Paper 2

Section: Physics

Question : 8 of 57

Marks: +1, -0

Image of an object approaching a convex mirror of radius of curvature 20 m along its optical axis is observed to move from

m to 4

m in 30 s. What is the speed of the object in km per hour?

[JEE Adv 2010 P2]

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