An air bubble comes from the bottom to the surface of a lake of depth 2.5 m. The surface temperature of the lake is 40°C. The diameter of the bubble at the bottom and at the surface are 3.6 mm and 4 mm respectively. Find the temperature of the lake at the bottom.

An air bubble comes from the bottom to the surface of a lake of depth

1.	An air bubble comes from the bottom to the surface of a lake of depth 2.5 m. The surface temperature of the lake is 40°C. The diameter of the bubble at the bottom and at the surface are 3.6 mm and 4 mm respectively. Find the temperature of the lake at the bottom.
Answer» `5.3^(@) C` `12.5^(@) C` `20.3^(@) C` `30.3^(@) C` ANSWER :B