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Time and Work

If 5 people...

Question

If $5$ people can paint a house in $16$ hours, how many people are required to complete the job in $10$ hours?

A

32

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B

8

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C

24

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D

120

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Solution

The correct option is A $8$
It is the case of inverse proportion.
$5 \times 16 = k = x \times 10$
$\Rightarrow x = \frac{5 \times 16}{10} = 8$

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