Solve using elimination x-3y=7 and 2x-6y=12 *
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Let side be "a" cm. So another side is (30-2a)/2=15-a
S=ab=a(15-a)=15a-a^2 - parabola
maximum when a = -15/-2=7.5 cm
When a=7.5 all sides are 7.5 cm
So it's a square. S=a*a=7.5*7.5=56.25 cm^2 - max
There is no global minimun for S.(look at the graphic)
S=ab=a(15-a)=15a-a^2 - parabola
maximum when a = -15/-2=7.5 cm
When a=7.5 all sides are 7.5 cm
So it's a square. S=a*a=7.5*7.5=56.25 cm^2 - max
There is no global minimun for S.(look at the graphic)
The surface area of a rectangular prism is 2210 cm^2 Then the other dimension is 70.3 cm
<h3><u>Solution:</u></h3>Given that surface area of rectangular prism is 2210 square centimeter
Also given that two of dimensions are 5 cm and 10 cm
To find: other dimension
<em><u>The total surface area of the rectangular prism is gievn as:</u></em>
Where, "l" is the length and "b" is the breadth and "h" is the height
The given values are: l = 5cm and b = 10cm
On substituting the given values in formula we get,
Thus the other dimension is 70.3 cm