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.