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`        Please guide me in this question?`
2 years ago

Arun
23385 Points
```							Dear Sneha u = -25 cm f = - 10 cmUsing mirror formula, 1/f = 1/u + 1/v -1/10 = -1/25 + 1/v v = - 50/3 Magnification m,m = - v/u = - [(-50/3)/(-25)] = -2/3m = I/O = - 2/3 Length and breath both change in the same proportion. Area of the object AO = 3 x 3 = 9 cm2  AI/AO = (-2/3)2 AI = (4/9) x 9 = 4 cm2  RegardsArun (askIITians forum expert)
```
2 years ago
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