Q1. What is the correct formula for cuboid volume?
✔ Multiply all three dimensions: length, width and height.
Q2. How many cubic centimetres are in one litre?
✔ One thousand cubic centimetres equals one litre.
Q3. Siti's tank is 50cm by 20cm by 10cm. What is the volume?
✔ 50 times 20 times 10 equals ten thousand.
Show transcript
[Slide 1] Understanding Volume Intuition
Imagine filling a rectangular box with water. Volume tells us how much liquid fits inside. We use this for tanks at the hawker centre.
[Slide 2] The Formula and Bar Model
Use the formula for a cuboid shape. Draw a bar model to visualise the space. This helps you track each dimension clearly.
[Slide 3] Worked Example Setup
Siti buys a fish tank at Tampines Mall. The length is forty centimetres and width is thirty. We need to find the total volume first.
[Slide 4] Worked Example Calculation
The height is twenty-five centimetres for the tank. Multiply forty by thirty and then twenty-five. This gives thirty thousand cubic centimetres of space.
[Slide 5] Common Mistake Alert
Many students forget to change cubic centimetres. Remember one thousand cubic centimetres is one litre. Always check the required unit in the question.
[Slide 6] Quick Recap Steps
First find the volume using the formula. Then divide by one thousand for litres. Practice this for your PSLE exam success.