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A fish 40cm beneath the surface of pond sees a bird directly over head. If the bird is actually 15cm above the water surface, the same appears to be seen by the fish above the water surface at a height of $(μ = 4 / 3)$

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25 cm

30 cm

20 cm

10 cm

answer is B.

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Detailed Solution

$A D = μ h = \frac{4}{3} \times 15 = 20$

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