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primary 6 | Maths | Ratio
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Date Posted: 11 months ago
Views: 166
sstrike
Sstrike
11 months ago
【difference unchanged】

now
F : B : B-F = 3:5:2 = 6u:10u:4u

9 yrs ago
F : B : B-F = 3u:7u:4u

6u-3u = 10u-7u = 3u = 9 yrs

now for brother
10u = 10×9÷3 = 30 (Ans)

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Xavier Sng
Xavier Sng's answer
801 answers (A Helpful Person)
1st
Hope this helps. Regards
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Duxe
Duxe's answer
5 answers (Tutor Details)
if there’s anything you’re unsure of, pls feel free to comment