Turn on thread page Beta
    • Thread Starter

    Hi guys could anyone take a look at question 3b. This question just seems weird and i dont understand where they got the answer from.

    Will post questions below.

    • Thread Starter

    Name:  image.jpg
Views: 13
Size:  523.7 KBAttachment 675642675644
    Attached Images

    2 strips -> 4 strips makes 1.508 to 1.329 which is a difference of 0.179 (0.18 in answer)
    4 strips -> 8 strips makes 1.329 to 1.282 which is a difference of 0.047 (0.05 in answer)
    \frac{0.047}{0.179} \approx 0.39.. \approx \frac{1}{3} so that's the reduction in difference of area each time. Then just keep reducing the answer based on this pattern giving you some answer within 1.25-1.27 which would be acceptable.

    In an exam, you would (hopefully) not be asked to give such logic seeing as it's not really 1/3rd difference change.

    Hope this helped (and I hope I didn't misunderstand the book either)
Submit reply
Turn on thread page Beta
Updated: July 21, 2017
Favourite type of bread
Useful resources

Make your revision easier


Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here


How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.