A poster of total area 256 in2 is to have a margin of 4 inches at the top and bottom and 1 inch at each side. (a) Find the dimensions of the poster which give the largest printed area. (b) Suppose that, instead, we know the poster will contain 256 in2 of printed material with margins of 4 inches at the top and bottom and 1 inch at each side. Find the dimensions of the poster that minimize its total size.

Question

A poster of total area 256 in2 is to have a margin of 4 inches at the top and bottom and 1 inch at each side. (a) Find the dimensions of the poster which give the largest printed area. 	 	  (b) Suppose that, instead, we know the poster will contain 256 in2 of printed material with margins of 4 inches at the top and bottom and 1 inch at each side. Find the dimensions of the poster that minimize its total size.

anonymous · Answer

i have the first part. i got h=32 and w=8 
these are correct, i just cant get part (b)