It is currently Mon Oct 24, 2016 10:36 am

 All times are UTC

 Page 1 of 1 [ 3 posts ]
 Print view Previous topic | Next topic
Author Message
 Post subject: Need help to calculate question 25 and 26.Posted: Sun Aug 16, 2009 12:23 am

Joined: Wed Aug 12, 2009 11:49 pm
Posts: 32

I could anbody help me work out the answer on the above link. It is maths paper 2. I have tried to use pythageus to calculate the missing length but getting confused.

Top

 Post subject: Re: Need help to calculate question 25 and 26.Posted: Sun Aug 16, 2009 6:46 am

Joined: Sun Jul 26, 2009 5:01 pm
Posts: 22
Location: Surrey
if you're referring to ques 19-24.

perimeter = sum of all sides of the rectangle.
= 2*Length+ 2*sides
48 = 2*L + 2*W

But it says the length is 2x the width, so L = 2W

48 = 2*(2W) + 2W
Width = 6 and
Length = 2xwidth = 2*6 = 12
total Area = Length*width = 12*6 = 72

Area triangle by logic, the traingle cuts the rectangle into 2 equal parts so the answer is 36.

ques 25 . the figure can be split into two. a rectangle and a triangle, the rectangle has sides of 5cm by 10cm. Area = 50 sq cm.

The triangle has 5cm by 6cm dimensions, so the area is 15sq cm

total area of shape B is 65sq cm.

using Phytagorean theorem, the length of the missing side is 7.8cm

so perimeter is sum of all sides = 5+10+7.8+16

hope this helps

scooby1 wrote:

I could anbody help me work out the answer on the above link. It is maths paper 2. I have tried to use pythageus to calculate the missing length but getting confused.

Top

 Post subject: Posted: Sun Aug 16, 2009 2:07 pm

Joined: Wed Aug 12, 2009 11:49 pm
Posts: 32
Thanks bugsbunny. I can see how you have worked it out.

Top

 Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending
 Page 1 of 1 [ 3 posts ]

 All times are UTC

#### Who is online

Users browsing this forum: Exabot [Bot] and 3 guests

 You cannot post new topics in this forumYou cannot reply to topics in this forumYou cannot edit your posts in this forumYou cannot delete your posts in this forumYou cannot post attachments in this forum

Search for:
 Jump to:  Select a forum ------------------ FORUM RULES    Forum Rules and FAQs 11 PLUS SUBJECTS    VERBAL REASONING    MATHS    ENGLISH    NON-VERBAL REASONING    CEM 11 Plus GENERAL    GENERAL 11 PLUS TOPICS    11 PLUS APPEALS    11 PLUS TUTORS    INDEPENDENT SCHOOLS    11 PLUS CDs/SOFTWARE    11 PLUS TIPS    PRIMARY    SEN and the 11 PLUS    EVERYTHING ELSE .... 11 PLUS REGIONS    Berkshire    Bexley and Bromley    Birmingham, Walsall, Wolverhampton and Wrekin    Buckinghamshire    Devon    Dorset    Essex    Essex - Redbridge    Gloucestershire    Hertfordshire (South West)    Hertfordshire (Other and North London)    Kent    Lancashire & Cumbria    Lincolnshire    Medway    Northern Ireland    Surrey (Sutton, Kingston and Wandsworth)    Trafford    Warwickshire    Wiltshire    Wirral    Yorkshire BEYOND 11 PLUS    Beyond 11 Plus - General    GCSEs    6th Form    University