The focal lengths of the objective and the eye-piese of an astronomical telescope are `0.25`m and `0.025`m, respectively. The telescope is focussed on an object 5 m from the objective, the final image being formed `0.25`m from the eye of the observer. Calculate the length of the telescope and its magnifying power.
[Hint : Mag. power = `v_(0)//u_(e)`]
