Problema Solution
On a sketch of a mural, 3 inches represents one foot in the mural. A door in the sketch is 2 inches wide by 5 inches high. What is the perimeter of the door in the mural expressed in inches?
Answer provided by our tutors
perimeter = 2H + 2W
the width is 2 inches, the height is 5 inches
so you have:
p = 2(2) + 2(5) inches
= 4 + 10 inches
= 14 inches
3 inches represents one foot, so one inch represents 1/3 of a foot
so multiply the perimeter by 1/3
14 * 1/3 = 4 & 2/3 therefore, the perimeter of the door is 4 2/3 feet.