A small telescope has an objective lens of focal length 140 cm and eyepiece of focal length 5.0 cm What is the magnifying power of telescope for viewing distant objects when the telescope is in normal adjustment (ie When the final image is at infinity ). What is the height of the final image of the tower if it is formed at 25 cm ?

Question

$\begin{array}{1 1} 28.2 \;cm \\ -28.2\;cm \\ 20.2 \;cm \\-20.2\;cm \end{array} $