Sign Up!
Welcome to
Saturday, February 24 2018 @ 03:39 PM CST
 Forum Index >  Test Paper Related >  Primary 5 Matters
 Question 9 (Percentage)
   |  Printable Version
By: tictactoe (offline)  Friday, August 03 2012 @ 07:21 AM CDT (Read 664 times)  

Hello , I need help with this question.
The capacity of a jug is twice that of a bottle . The jug is 25% filled with water . If the bottle is empty at first, and all the water is then poured from the jug into the bottle, what percentage of the bottle will be filled with water?

The answer key is : 50%.

Thanks Smile

Forum Newbie

Registered: 07/28/12
Posts: 8

Profile Email    
By: echeewh (offline)  Friday, August 03 2012 @ 07:06 PM CDT  

Hi there,

Following pls find the worked solution and explanation:

25% = (1/4)
This volume of water is poured into bottle (B ).

Jug(J) : B
2 : 1

Since capacity of J is 2x that of J, we have ...

Vol of water in B = (1/4) x 2= (1/2) = 50%

Alternatively, can also use <Model> method as shown:

** - buffer space for alignment purpose

**<-------- 2p ------------>
J |-------------|-------------|
B |-------------|
**<--- 1p --->

Given that (1/4) of J is filled with water, we have 2p of J divided into 4 equal units (u). Likewise, the 1p of B is also divided into 2u.

J |------|------|------|------|
B |------|------|

Since that 1u of W from J is poured into B, it would fill up the same 1u in B. From the model in B, fraction of B filled up with W is (1/2) = 50%.


Trust this helps.

Do let me know again should there be any clarification.


Forum Active Member
Active Member

Registered: 04/21/11
Posts: 627

Profile Email    

 All times are CST. The time is now 03:39 pm.
Normal Topic Normal Topic
Locked Topic Locked Topic
Sticky Topic Sticky Topic
New Post New Post
Sticky Topic w/ New Post Sticky Topic w/ New Post
Locked Topic w/ New Post Locked Topic w/ New Post
View Anonymous Posts 
Able to Post 
HTML Allowed 
Censored Content