Ratio, Rate & Speed
In this Ratio, Rate & Speed course, we will revisit and strengthen the key concepts that you learned in your earlier years.
For ratio, you will review how to compare quantities, simplify ratios, and apply them to real-life situations such as sharing and proportions.
For rate, you will learn how to interpret and calculate quantities that involve different units, such as cost per item or distance per unit.
For speed, you will revise the relationship between distance, time, and speed, and learn how to solve problems involving motion in a clear and systematic way.
Through guided explanations and practical examples, this course will help you connect these topics together.
Related Lessons:
Ratio
A ratio is an ordered comparison of two quantities, usually written as ( p : q ). For example, if there are 2 boys and 3 girls, the ratio can be written as 2 : 3, meaning for every 2 boys, there are 3 girls.
In this video, we will go beyond basic ratios and learn how to solve problem sums involving two sets of ratios and three sets of ratios. You will learn how to combine ratios, find common terms, and apply step-by-step methods to solve more complex questions effectively.
Basic Unit Conversion
Below are the most common unit’s conversion that we use frequently in Mathematics:
- 1 kilometres = 1000 metres
- 1 metre = 100 centimetres
- 1 centimetres = 10 millimetres
- 1 hour = 60 minutes
- 1 min = 60 seconds
How To Convert Between Different Units
When performing units conversion, the trick is to break down any units into basic units. For example:
- 1\(km^2\)=1km x 1km
- 5m/s=\(\frac{5m}{1s}\)
Once we breakdown complex units into simplified form, we can convert easily between units.
Distance Speed Time
We can memorise the distance-speed-time relationship using the DST triangle. And the formula is:
\(distance=\frac{speed}{time}\)