The length of the rectangle is 4 times the height. the area of the triangle is 63 cm2. Find the width. Round to the nearest tenth of an inch

area = l x h

l=4h

area = 4h x h = 4h^2

4h^2 = 63

63/4 = 15.75

h^2 = 15.75

sqrt (15.75) = h

h = 3.968cm

rounded to nearest tenth would be 4.0cm

check L=4 (4) = 16 x 4 = 64 (since it was round 64 is pretty close to 63)