P3 Maths question

[Gladys]

Hi,

Anyone can help me solve this problem sum. Can use model to solve this type of sum. How to interpret it? Thank you so much.


Mr Lim is five times as old as Philip. He is 52 years older than Philip. How old will Philip be in 8 years' time? Ans : 21 years

 

[stonston]

This is a very simple & straightforward question.
Going out now. Hard to post the model with iPhone. Will reply later.

 

[RamblingMummy]

Mr Lim: 5 units
Philip: 1 unit
(as Mr Lim is 5times as old as Philip)

Difference--> 5units - 1 unit
= 4 units
4 units --> 52 years old (as Mr Lim is years older than Philip)
1 unit --> 52/4
= 13 years old (which is also Philip's age now as he only has 1 unit)
In 8 yrs' time, Philip will be --> 13 + 8
=21 years old.

Drawing models will make it clearer

 

[Gladys]

Mr Lim: 5 units
Philip: 1 unit
(as Mr Lim is 5times as old as Philip)

Difference--> 5units - 1 unit
= 4 units
4 units --> 52 years old (as Mr Lim is years older than Philip)
1 unit --> 52/4
= 13 years old (which is also Philip's age now as he only has 1 unit)
In 8 yrs' time, Philip will be --> 13 + 8
=21 years old.

Drawing models will make it clearer

Paiseh.. I am getting old. Think very long still but cannot get the working. Thanks for the working.

 

[stonston]

Mr Lim is five times as old as Philip. He is 52 years older than Philip. How old will Philip be in 8 years' time? Ans : 21 years

NOW:
As Mr Lim is 5 times as old as Philip, Mr Lim will have 5 units and Philip will have 1 unit:
Mr Lim [=][=][=][=][=]
Philip `[=]

Mr Lim is 52 years older than Philip (difference between Mr Lim and Philip is 52 years):
Mr Lim [=][=][=][=][=]
Philip `[=]<----52--->

So, 4 units = 52 years
1 unit = 52/4 = 13 years

Philip is 13 years old now.

In 8 year's time means 8 years later.
So,
13 + 8 = 21
Philip will be 21 years old in 8 year's time.