## Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.

## Question

primary 6 | Maths
| Ratio

** One Answer Below **

Anyone can contribute an answer, even non-tutors.

**Answer This Question**

Please help

Thank you.

At first, ratio = 3:7

Difference = 7 - 3 = 4

In 10 years, ratio = 11:19

Difference = 19 - 11 = 8

Notice that their age difference will always be the same. So, make the difference of the ratio at first the same as the one after 10 years.

3 : 7 → x2 → 6 : 14

Difference = 4 → x2 = 8

However, 11- 6 = 5

19 - 14 = 5

This is not correct as only difference between future and present is only 5 years. So, we need to multiply by 2.

Ratio at first = 6 : 14 = 12 : 28

Ratio in 10 years time = 11:19 = 22 : 38

Check:

22 - 12 = 10 (correct)

38 - 28 = 10 (correct)

### See 1 Answer

*done*{{ upvoteCount }} Upvotes

*clear*{{ downvoteCount * -1 }} Downvotes