Question

1. The mercury in a barometer stands at 75 cm by
the side of a fresh water lake. An air bubble at the
bottom of the lake when rises to the surface, its
volume becomes three times its volume at the
40
bottom. If specific gravity of the mercury is
3
then depth of the lake is
(1) 10 m
(2) 20 m
(3) 30 m
(4) 40 m​

Answer 1

Answer:

ans is 30 I hope you anderstand my ans

Answer 2

Answer:

20 m

Explanation

Please check the attachment