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Geometrical Optics question

2010 · Shift 2 · Q50
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Geometrical Optics question

2010 · Shift 2 · Q50

JEE AdvancedPhysicsGeometrical OpticsNumerical+3 / −1
Image of an object approaching a convex mirror of radius of curvature 20 m along its optical axis is observed to move from 253{{25} \over 3}325​ m to 507{{50} \over 7}750​ m in 30 s. What is the speed of the object in km per hour?
Numerical answer
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