This swimming pool covers 300 square meters.
(2)25× 12+ 12× 1.4×2+25× 1.4×2
=300+33.6+70
=403.6 square meters
2 decimeters =0.2 meters
403.6÷(0.2×0.2)
=403.6÷0.04
= 10090 (block)
A: A * * * needs 10090 yuan.
(3)25× 12× 1.4
=300× 1.4
=420 (square meter) =420000 (liter)
Answer: It can hold 420,000 liters of water.