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 Post subject: help pleasePosted: Tue Nov 22, 2011 9:51 pm

Joined: Tue Feb 22, 2011 11:06 pm
Posts: 75
the latymer school past paper 2005

putting factor 6 suncream on means that you can stay in the sun 6 times longer than is normally safe.

one day last summer it was safe to be in the sun for 1 1/2 hours with the sun cream on, how long would have been safe without it ?

can anyone explain the work out please .thank you very much for all your help.

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 Post subject: Re: help pleasePosted: Tue Nov 22, 2011 9:54 pm

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 13036
senthi - this is the third question you have posted recently ....

Quote:
putting factor 6 suncream on means that you can stay in the sun 6 times longer than is normally safe.

one day last summer it was safe to be in the sun for 1 1/2 hours with the sun cream on, how long would have been safe without it ?

So 1.5 hours must be 6 times the safe time; so we need to divide by 6 - 1.5 hours =90 mins

90 divided by 6 = 15 mins

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 Post subject: Re: help pleasePosted: Tue Nov 22, 2011 10:04 pm

Joined: Tue Feb 22, 2011 11:06 pm
Posts: 75
thank you very much guest55.

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