Topic Content:
- Inverse Proportion
- End of Lesson Evaluation Questions
What is Inverse Proportion?
Two quantities are in inverse proportion if one increases and the other decreases at the same rate.
Worked Example 11.3.1:
35 workers can build a house in 16 days. How many days will it take 28 workers working at the same rate to build the same house?
Solution
1. Let x represent the number of days it will take 28 works.
No of workers | No of days |
35 | 16 |
28 (the number of workers decreased) | x (the number of days will increase) |
28 = 35 × 16
divide both sides by 28
\( \frac{28x}{28} = \frac{35 \; \times \; 16}{28} \)
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