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primary 6 | Maths
| Ratio
2 Answers Below
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Hi AC Lim, please help to answer the question. No algebra please. Thanks in advance!
Date Posted: 4 years ago
Views: 632
1u = 96/4 = 24
(a)
at first, 120 in B
(b)
in the end, total = 216 - 46 = 170
.
(a)
at first, 120 in B
(b)
in the end, total = 216 - 46 = 170
.
Why 96/4? Thanks!
at first
A: 4u
B: 5u
total = 9u
after
A: 4u - 16
B: 5u - 30
total = 9u - 46
(4u - 16) . 9 = (5u - 30) . 8
36 u - 144 = 40u - 240
1u = 24
.
A: 4u
B: 5u
total = 9u
after
A: 4u - 16
B: 5u - 30
total = 9u - 46
(4u - 16) . 9 = (5u - 30) . 8
36 u - 144 = 40u - 240
1u = 24
.
Very clear, thanks!
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Hope this helps.
Date Posted:
4 years ago
Thanks! These are simultaneous equations already. Do you have a simpler method?
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Can use guess and check method. I found it is more complicated.
Date Posted:
4 years ago
Thanks! I don’t do guess and check either.
OK. Snell's answer is simplest method to solved this type of question. (Ratio).
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