Question 1023057
Hi there,
Volume of fish tank at present:-
base area x present depth
Volume = 45 cm^2 x 12 cm
Volume = 540 cm^3
Volume of tank full:-
base area x height
Volume = 45 cm^2 x 25 cm
Volume = 1125 cm^3
The volume of water to fill
tank to brim:-
1125 - 540 = 585 cm^3
Hope this helps :-)