A bubble in glass slab `(mu = 1.5)` when viewed from one side appears at 5 cm and 2 cm from other side, then thickness of slab is :

A bubble in glass slab (=1.5) when viewed from one side appears at 5 cm and 2 cm from other side, then thickness of slab is:

An air bubble inside a glass slab (µ=1.5) appears 6 cm when viewed from one side and 4 cm when viewed from the opposite side. The thickness of the slab is

An air bubble inside a glass slab (µ=1.5) appears 6 cm when viewed from one side and 4 cm when viewed from the opposite side. The thickness of the slab is

An air bubble inside a glass slab (µ=1.5) appears 6 cm when viewed from one side and 4 cm when viewed from the opposite side. The thickness of the slab is

An air bubble inside a glass slab (mu= 1.5) appears at 6 cm when viewed from one side and 4 cm when viewed from the opposite side. The thickness of the slab is

An air bubble in a glass slab (n = 1.5) is 5 cm deep when viewed from one face and 2 cm deep when viewed from the opposite face. The thickness of the slab is