A lady cannot see objects closer than 40cm


A lady cannot see objects closer than $40 \mathrm{~cm}$ from the left eye and/closer than $100 \mathrm{~cm}$ from the right eye. While on a mountaineering' trip, she is lost from her team. She tries to make an astronomical telescope/ from her reading glasses to look for her teammates.

(a) Which glass should she use as the eyepiece ?

(b) What magnification can she get with relaxed eye?


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