Introduction
- When we calculate a quantity using other quantities then it is called a Compound Measure which represents the relationship between these quantities and the units used.
- The Compound Measures are denoted as Ratio or Rate such as “per” unit (km/h, m/s etc.)
- These Measures are widely used in Business, Engineering and Science and solving real-life problems.
Examples:
- Speed
- Density
- Pressure
Easy Way to Solve Problems
- We can make it easy to solve the problems related to Compound Measures by learning the Triangle method.
Consider following three Compound Measures –
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- Let us see the use of the Triangle to find one quantity if the other two are known.
To find Speed:
- Hide Speed in the Triangle, then using Distance and Time as the quantities remaining, formula for calculating Speed will be-
$$Speed = \frac{Distance}{Time}$$
To find Distance:
- Hide Distance in the Triangle, then using Speed and Time as the quantities remaining, formula for calculating Distance is
$$Distance = Speed \times Time$$
To find Time:
- Hide Time in the Triangle, then using Speed and Distance as the quantities remaining formula for calculating Time is –
$$Time = \frac{Distance}{Speed}$$
