A meter scale is placed along the axis of a convex mirror of focal length 25cm, its nearer end being at a distance of 50cm. calculate size of the image formed. ans)

Explanation:

this is the answer.....................

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see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west