The figure shows a rectangular glass tank partly filled with 1-cm cubes. After adding 7 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 + 7
= 19
Extra cubes to fill
= 24 - 19
= 5
(b)
Volume of one cube
= 1 x 1 x 1
= 1 cm
3 Volume of the tank
= 24 x 1
= 24 cm
3 Answer(s): (a) 5; (b) 24 cm
3