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Mathematics 21 Online
OpenStudy (anonymous):

An industrial shed is to have a total floor space of 600m^2 and is to be divided into 3 rectangular rooms of equal size.The walls,internal and external will cost RM60 per metre to build.What dimensions should the shed have to minimize the cost of the walls?

OpenStudy (anonymous):

Is this a multiple choice question?

OpenStudy (anonymous):

and is there an image that comes along with this question?

OpenStudy (anonymous):

|dw:1345980588586:dw|

OpenStudy (anonymous):

I think this division of rooms will surely lower the cost

OpenStudy (anonymous):

its not multiple choice question and no image for this question

OpenStudy (anonymous):

Now, Area of each rectangle = 200m^2

OpenStudy (anonymous):

|dw:1345980692983:dw|

OpenStudy (anonymous):

Okay. @sauravshakya 's drawing will work then. :)

OpenStudy (anonymous):

Now, x*y=200 y=200/x

OpenStudy (anonymous):

Now, we have to find the minimum value of x+y =x+200/x

OpenStudy (anonymous):

=(x^2+200)/x

OpenStudy (anonymous):

i guess the shed should be|dw:1345981136453:dw|

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