60×40+(60×50+40×50)×2 = 12400 cm2。

The second fish tank needs glass.

50× 50× 5 = 12500 cm2

The first fish tank holds water.

60× 40× 50 = 120000 cubic centimeters = 120 liters.

The second fish tank holds water.

50× 50× 50 = 125000 cubic centimeters = 125 liters.