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 Post subject: Help pleasePosted: Sat Jul 27, 2013 8:02 pm

Joined: Sun Jan 20, 2013 10:22 am
Posts: 73
GL, Maths 5, Q50

A tin of paint costs £6 and will cover 5 square meters of wall.
What is the cost of paint tins for a wall 4.5m and 3m high.

answer is £18.00, but i am getting £16.20 which one is correct and how to do this one.

GL, Maths 5, Q18

Not sure how to find the areas of each one. any help please.

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 Post subject: Re: Help pleasePosted: Sat Jul 27, 2013 8:10 pm

Joined: Tue Jul 21, 2009 9:56 pm
Posts: 8228
I think it is 18 because you would have to buy 3 tins at 6 each. They are not allowing you to cost up a fraction of a tin.

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 Post subject: Re: Help pleasePosted: Sat Jul 27, 2013 8:49 pm

Joined: Sun Jan 20, 2013 10:22 am
Posts: 73

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 Post subject: Re: Help pleasePosted: Sat Jul 27, 2013 9:59 pm

Joined: Thu Mar 14, 2013 6:30 pm
Posts: 583
area = length x width

Area of first line is 5m2
Area of wall is 4x3.5= 13.5m2

Therefore you need to buy 3 whole tins to cover 13.5m2, hence £18

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 Post subject: Re: Help pleasePosted: Sun Jul 28, 2013 12:10 pm

Joined: Sat Dec 03, 2011 3:14 pm
Posts: 625
The question is badly worded as you would need to buy 3 tins irrespective of how much you actually need. So the cost of painting the wall includes your left-over paint as well.

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 Post subject: Re: Help pleasePosted: Sun Jul 28, 2013 6:16 pm

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 11937
It does ask for the cost of paint tins so the wording is fine.

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 Post subject: Re: Help pleasePosted: Sun Jul 28, 2013 8:27 pm

Joined: Mon Jun 18, 2007 2:32 pm
Posts: 6966
Location: East Kent
Goldenstar, you have had a lot of help from this forum, perhaps you would like to repay everyone's kindness by contributing more to the discussions and helping others
yoyo
moderator

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 Post subject: Re: Help pleasePosted: Mon Aug 05, 2013 8:09 pm

Joined: Sun Jan 20, 2013 10:22 am
Posts: 73
Sure, if I am able to answer any question to the forum people I will do. Your site is really useful and I would like to contribute something. Can I be a moderator .

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 Post subject: Re: Help pleasePosted: Mon Aug 05, 2013 8:45 pm

Joined: Tue Jul 21, 2009 9:56 pm
Posts: 8228
Like!

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 Post subject: Re: Help pleasePosted: Mon Aug 05, 2013 9:08 pm

Joined: Thu Oct 18, 2012 9:41 am
Posts: 434

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