24.
30 labourers, working 7 hours a day can finish a piece of work in 18 days. If
the labourers work 6 hours a day, then the number of labourers to finish the
same piece of work in 30 days, will be:
[A]
15
[C]
22
[B]
21
[D]
25
Answer : B
Explanation :
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Let
the required number of laourers be x. Then,
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Less
working hrs / day, More Labourers (Indirect Proportion)
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More
days, Less Labourers (Indirect Proportion)
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Working
Hrs / Day
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6
: 7
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Days
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30
: 18
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::
30 : x
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