Volume of a cuboid
Answers are for parents and teachers.
1
Find the volume of a cuboid 9 cm by 4 cm by 5 cm.
9 × 4 × 5 = 180 cm³.
2
A cuboid has volume 150 cm³, length 10 cm and width 5 cm. Find the height.
150 ÷ 50 = 3 cm.
3
How many boxes 5 cm by 4 cm by 2 cm fit in a box 20 cm by 12 cm by 10 cm?
4 × 3 × 5 = 60 boxes.
4
A cuboid 2 cm by 5 cm by 3 cm has its length and width doubled. Find both volumes and the ratio.
30 cm³ and 4 × 10 × 3 = 120 cm³. The ratio is 4 : 1.
5
Marwan says that doubling all sides of a cube doubles its volume. Explain why he is wrong with a cube of edge 1 cm.
Volume 1 cm³. With edge 2 cm the volume is 2 × 2 × 2 = 8 cm³, which is 8 times bigger, not 2.