Question 1113217
x is width, y is length of printed area
xy=48
the whole page is x+1.5 inches and y+2 inches
xy+2x+1.5y+3 has to be minimized.  xy=48
2x+1.5(48/x)+51 has to be minimized
2x+(72/x)+51
Take the derivative and set equal to 0.
2-(72/x^2)=0
72=2x^2
x^2=36
x=6 inches
y=8 inches
second derivative is +144/x^3, which is positive, so the critical point is a minimum.
The page has dimensions of 7.5 x 10 or 75 in^2,