Answer:
40 feet of the wall will be covered.
Step-by-step explanation:
A row of plaques cover an area of 120 square feet of space on the wall.
Height of the plaques is 3 feet then we have to tell the length of the wall that will be covered.
Area of the wall covered by plaques = Length of Plaques × width of the plaques
120 = length × 3
length = 120 ÷ 3 = 40 feet.
Therefore plaques will cover 40 feet of the wall.