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43.An air bubble raises from the bottom to the top of a lake. The ratio of volumes of the bubbles is 2:5:7 at A, B and C from the bottom. C lies at the surface of the lake. If H=10m of water, the difference in depths of A and B is |
| Answer» 43.An air bubble raises from the bottom to the top of a lake. The ratio of volumes of the bubbles is 2:5:7 at A, B and C from the bottom. C lies at the surface of the lake. If H=10m of water, the difference in depths of A and B is | |