5th term: \(135 \times 3 = 405\)
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- 2nd term: \(5 \times 3 = 15\)
- 3rd term: \(15 \times 3 = 45\)
- 4th term: \(45 \times 3 = 135\)
- 6th term: \(405 \times 3 = 1215\)
- A cylindrical tank with a radius of 3 meters and a height of 10 meters is filled with water. If the water level drops by 2 meters due to evaporation, calculate the volume of water remaining in the tank.
- Original volume: \(\pi \times 3^2 \times 10 = 90\pi\) cubic meters
