A fish tank is 60cm long, 30cm wide, 40cm high and contains 70L of water. Rocks with a volume of 3000cm cubed are placed into the tank. Will the tank overflow?

The tank WILL overflow.

60*30*40= 72000cm^3

The max volume the fish tank can hold: 72000cm^3

amount of L * 1000= cm^3

70L * 1000= 70000cm^3

There is already 70000cm^3 of water in the tank

70000cm^3 + 3000cm^3 = 73000cm^3

The tank can only hold 72000cm^3 and the water and rocks are 73000cm^3, so the tank will overflow.