Question

1. A bulb is placed at a depth of 2√7m in water and floating opaque disc is placed over the bulb so that
the bulb is not visible from the surface. The minimum diameter of the disc is

a) 42 m
b) 6 m
c) 27m
d) 1 2 m
pls give explain​

Answer 1

Answer:

option c is correct

please mark my answer as brainlist