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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?
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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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