Respuesta :
Answer:
The width of the building is 50 lamps and 60 lamps will be needed.
Step-by-step explanation:
The perimeter is computed by the sum of the sides of the building, since the length and width are equal on the oposite sides of the building, the perimeter is given by:
perimeter = 2*length + 2*width
900 = 2*(400) + 2*width
2*width + 800 = 900
2*width = 900 - 800
2*width = 100
width = 100/2 = 50 feets
To know how many lights bulbs will be needed we need to take the perimeter of the building and divide it by the space between the lamps. We have:
number o lamps = 900/15 = 60 lamps
Answer:
The width is 50 feet.
60 lights.
Step-by-step explanation:
The perimeter can be calculated as:
P = 2*L + 2*W,
where P is the perimeter, L is the length and W is the width.
Using this formula, we have that:
900 = 2*400 + 2*W
2*W = 100 -> W = 50 feet
If we use one light for every 15 feet around the building, we can find the total number of lights using rule of three:
15 feet -> 1 light
900 feet -> X lights
15/900 = 1/X
X = 900/15 = 60 lights
