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Question
A toy company requires 36 machines to produce car toys in 54 days. How many machines would be required to produce the same number of car toys in 81 days?
Solution
Let the required number of machines be x
| Number of machines | 36 | x |
| Number of days | 54 | 81 |
As the number of machines increases number of days required decreases.
∴ They are in inverse proportion,
x1y1 = x2 y2
36 × 54 = x × 81
x = `(36 xx 54)/81`
x = 24
∴ 24 machines would be required
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