Let's assume that you are hanging the picture vertically, that is, the width is 20 and the length vertically is 25.
so you want to maintain the ratio of height : width
right now, height : width = 25 : 20 = 5 : 4
new width = 20+10 = 30
new height = x
x/30 = 5/4
4x = 150
x = 37.5
increase in height = 37.5-25 = 12.5 cm
or 6.25 cm on each side
Notice I added the 5 cm to each end of the 20 cm side.
If otherwise, add the 5 cm each to the 25 cm side
I am having trouble with this question. I do not know where to begin. I am in Trig now and we are doing review but I forgot everything that I learned in Geometry. I want to understand how to do this problem.
"a picture measures 20 cm by 25 cm. the width of the matting and frame at top and bottom is 5 cm. how wide should the matting and frame be at the sides so that the framed picture is similar to the picture alone"
1 answer
1 answer