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https://vle.mathswatch.co.uk/images/questions/question238.png

 Apr 1, 2020
 #1
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Example   LOWER bound 

   the dimensions COULD be  15.75   (rounds to 15.8)       and 5.15 (rounds to 5.2)

        lower bound for perimeter could be   2 x (15.75 + 5.15) = 41.8  cm

 Apr 1, 2020
 #2
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the perimeter is wrong i dont really know

Guest Apr 1, 2020
 #3
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Of course it is wrong......you didn't do the work did you?  I gave you the LOWER limit of perimeter as an EXAMPLE.....you just typed in the answer didn't you?

 

 

Lower limit for AREA  would be   15.75 x 5.15 =    .......    cm2

 

 

 

I showed how to obtain the LOWER limit PERIMETER as an EXAMPLE to you ....YOU were supposed to do the UPPER limit of PERIMTER.....

ElectricPavlov  Apr 1, 2020
 #4
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lower bound do you round down

Guest Apr 1, 2020
 #5
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Your Q asks for the LOWER bound of AREA

  You need to find the lowerst values that will round to    15.8    and   5.2        which would be 15.75  and 5.15 cm respectively, then:

 

Lower limit for AREA  would be   15.75 x 5.15 =    .......    cm2

ElectricPavlov  Apr 1, 2020

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