Sign Up!
Login
Welcome to Test-paper.info
Sunday, May 28 2017 @ 03:40 AM CDT
 Forum Index >  Test Paper Related >  Primary 5 Matters
 P5 Maths
   |  Printable Version
By: Geeta (offline)  Sunday, October 30 2011 @ 01:26 AM CDT (Read 1355 times)  
Geeta

Hi, can you please help me with this question...


The length and breadth of a rectangle are both decreaased by 20%. By how many % will its area be decreased?


Thanks in advance.

need help in this too...

How many digits are needed to form the numbers from 1 - 99 ?

Forum Newbie
Newbie

Registered: 12/31/06
Posts: 12

Profile Email    
   
By: NQS (offline)  Sunday, October 30 2011 @ 03:07 AM CDT  
NQS

what school is this Rolling Eyes Question Confused

Forum Newbie
Newbie

Registered: 09/16/10
Posts: 9

Profile Email    
   
By: sokechan (offline)  Sunday, October 30 2011 @ 03:18 AM CDT  
sokechan

36%.

Eg.
Let's assume the rectangle is referring to a square. (A sq is a rect)

Original Length --> 10 cm
Area --> 100 cm2

After Length --> 8 cm
Area --> 64 cm2

100 cm2 - 64 cm2 = 36cm2
36/100 * 100 = 36%

Hope this helps...
And its from the Henry Park SA2 Mathematics 2010 Paper which I just did.

Forum Junior
Junior

Registered: 02/25/11
Posts: 23

Profile Email    
   
By: NQS (offline)  Sunday, October 30 2011 @ 03:20 AM CDT  
NQS

i thought the answer was 400% Oops! Oops! Oops! Oops! Oops! Oops!

Forum Newbie
Newbie

Registered: 09/16/10
Posts: 9

Profile Email    
   
By: Geeta (offline)  Sunday, October 30 2011 @ 03:30 AM CDT  
Geeta

Thank u so much Smile

Forum Newbie
Newbie

Registered: 12/31/06
Posts: 12

Profile Email    
   
By: sokechan (offline)  Sunday, October 30 2011 @ 04:02 AM CDT  
sokechan

1 - 9 -> 9 digits
10 - 99 -> 180 digits
Total -> 189 digits

Forum Junior
Junior

Registered: 02/25/11
Posts: 23

Profile Email    
   
By: Geeta (offline)  Sunday, October 30 2011 @ 04:48 AM CDT  
Geeta

You are too good... Thanks again... Big Grin

Forum Newbie
Newbie

Registered: 12/31/06
Posts: 12

Profile Email    
   


 All times are CDT. The time is now 03:40 am.
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