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primary 6 | Maths | Ratio
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Khairin
Khairin

primary 6 chevron_right Maths chevron_right Ratio chevron_right Singapore

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Date Posted: 1 month ago
Views: 18
snell
Snell
1 month ago
A : B = 3 : 1

A: 30 y.o.
B: 10 y.o.
difference =20 yrs

u yrs later
A: 30+u y.o.
B: 10+u y.o.

7 x (10+u) = 3 x (30+u)
u = 5

so 5 yrs later

ans: (1)


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AC Lim
Ac Lim's answer
2715 answers (A Helpful Person)
1st
Answer A In 5 years time . Hope this helps
Khairin
Khairin
1 month ago
Thanks