The figure shows a rectangular glass tank partly filled with 20-cm cubes. After adding 5 extra cubes,
- How many more cubes are needed to the tank completely?
- What is the volume of glass tank?
(a)
Total number of cubes that can fill the tank
= 4 x 2 x 3
= 24
Number of cubes in the tank after adding extra cubes
= 12 + 5
= 17
Extra cubes to fill
= 24 - 17
= 7
(b)
Volume of one cube
= 20 x 20 x 20
= 8000 cm
3 Volume of the tank
= 24 x 8000
= 192000 cm
3 Answer(s): (a) 7; (b) 192000 cm
3