help please
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help please
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 ?
answer is :15 minutes
can anyone explain the work out please .thank you very much for all your help.
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 ?
answer is :15 minutes
can anyone explain the work out please .thank you very much for all your help.
Re: help please
senthi - this is the third question you have posted recently ....
90 divided by 6 = 15 mins
So 1.5 hours must be 6 times the safe time; so we need to divide by 6 - 1.5 hours =90 minsputting 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 ?
90 divided by 6 = 15 mins