alleryAs the number of workers on a job increases, the time taken to finish it:
AIncreases in the same ratio
BStays the same
CFirst rises, then falls
DDecreases
Answer & Solution
Correct answer: D. Decreases
1. Two quantities are in inverse proportion when one rises as the other falls.
2. As the number of workers increases, the time taken to finish the job decreases.
3. Doubling the workers halves the time, so the product of workers and days stays constant.
4. That constant product is the total work to be done.
5. Option A describes direct proportion, which is the opposite relationship.
_Source: syllabus Maths, Ch 11 'Direct and Inverse Proportions', S11.3 Inverse Proportion_
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