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The focal lengths of objective lens and eye lens of a Gallelian Telescope are respectively 30 cm and 3.0 cm . Telescope produces virtual , erect image of an object situated far away from it at least distance of distinct vision from the eye lens . In this condition , the magnifying power of the Gallelian Telescope should be :

$(a)\;+11.2\qquad(b)\;-11.2\qquad(c)\;-8.8\qquad(d)\;+8.8$

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