[填空题]
Peter has two water tanks with goldfish inside. The ,i0v fg 9+c 44wyjl,uqe3obehac/x; kfirst tank is in the sq+uou7 atg u7:j3n9jb hape of a cylinder with diameter 4040 cm and height 45 cm. The second tank is in the shape jtaub+7g nquu 7o3j:9of a cuboid with length 40 cm, width 32 cm, and height 42 cm.
1.Calculate the volume, giving your answer in $cm^3$ correct to three significant figures,
1.of the first water tank; $cm^3$
2.of the second water tank. $cm^3$
Each goldfish requires $15000 cm^3$ of fresh water for a comfortable life.
2.Calculate the number of goldfish Peter can safely put into his tanks. goldfish
