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Question
primary 5 | Maths
| Rate & Ratio
2 Answers Below
Anyone can contribute an answer, even non-tutors.
Can anyone help. Thank you so much.
Date Posted: 1 year ago
Views: 271
Let the job = 240u, 1 man =1u per day
5 men → 240u →48 days
6 men → 240u →40 days
8 men → 240u →30 days
10 men → 240u →24 days
12 men → 240u → 20 days.
Therefore, 12 men reduced 48-20 = 28 days.
Need another 7 men.
5 men → 240u →48 days
6 men → 240u →40 days
8 men → 240u →30 days
10 men → 240u →24 days
12 men → 240u → 20 days.
Therefore, 12 men reduced 48-20 = 28 days.
Need another 7 men.
See 2 Answers
done
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Hope this helps ♦
Date Posted:
1 year ago
done
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Using the concept of workload represented by the number of workers multiplied by the number of days, this becomes a very quick way to derive the answer. Hope it helps. Regards
Date Posted:
1 year ago
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