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primary 5 | Maths
| Rate & Ratio
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Hi, need urgent help on these 2 ratio questions. Thank you so much.
Date Posted: 4 years ago
Views: 353
now
A: 2u
father: 7u
8 yrs later
A: 2u + 8
father: 7u + 8
5 . (2u + 8) = 2 . (7u + 8)
10u + 40 = 14u + 16
1u = 24/4 = 6
A age now 12 y.o.
.
A: 2u
father: 7u
8 yrs later
A: 2u + 8
father: 7u + 8
5 . (2u + 8) = 2 . (7u + 8)
10u + 40 = 14u + 16
1u = 24/4 = 6
A age now 12 y.o.
.
now
M: 3u
C: 7u = 42
3u = 42/7 x 3 = 18
n yrs ago
M: 18-n
C: 42-n
42-n = 4 . (18-n)
n = 30/3 = 10
10 yrs ago
.
.
.
M: 3u
C: 7u = 42
3u = 42/7 x 3 = 18
n yrs ago
M: 18-n
C: 42-n
42-n = 4 . (18-n)
n = 30/3 = 10
10 yrs ago
.
.
.
Thank you
See 1 Answer
done
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Hi!
Date Posted:
4 years ago
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