The focal lengths of objective and eyepiece of a compound microscope are 5 cm, 6.25 cm respectively. When an object is placed infornt of the objective at a distance of 6.25 cm, the final image is formed at least distance of distinct vision. The length of microscope is
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a
22.5cm
b
25.0cm
c
30.0cm
d
31.25 cm
answer is C.
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