Correct Answer - 8.6cm ; 1.8cm

Here, `h_(1) = 2.5 cm, u = -12 cm, f = 30 cm, v = ?, m = ?`

As `(1)/(v) + 1/u = (1)/(f), (1)/(v) - 1/12 = 1/30`

or `(1)/(v) = 1/30 + 1/12 = (2+5)/60 = 7/60` or `v= 60/7 = 8.6 cm`

Positive sign of v shows that the image is virtual.

`m = (h_(2))/(h_(1)) = -v/u = - 60/(7xx(-12))` or `(h_(2))/(2.5) = 5/7 `or `h_(2) = 1.8 cm`.