Sergio plans to paint the 4 walls of his room with 1 coat of paint. The walls are rectangular,and, according to his measurements, each wall is 10 feet by 15 feet. He will not need to paint the single 3-foot-by-foot rectangular window on his room and the 3.5-foot-by-7-foot rectangular door. Sergio knows that each gallon of paint covers between 300 and 350 square feet. I fonly 1-galloon cans of paint are availabe, which of the following is the minimum number of cans of paint Sergio needs to buy to paint his walls?

Question

Sergio plans to paint the 4 walls of his room with 1 coat of paint. The walls are rectangular,and, according to his measurements, each wall is 10 feet by 15 feet. He will not need to paint the single 3-foot-by-foot rectangular window on his room and the 3.5-foot-by-7-foot  rectangular door. Sergio knows that each gallon of paint covers between 300 and 350 square feet. I fonly 1-galloon cans of paint are availabe, which of the following is the minimum number of cans of paint Sergio needs to buy to paint his walls?

campbell_st · Answer

ouch... it hurts my head reading the information in this question...

anonymous · Answer

im sayinggg!!!

campbell_st · Answer

ok... start by finding the area of the 4 walls.. 

Area = 4( 10 x 15)

Area = 600 ft^2

next find the area of the door and window and subtract it... 

is the window 3 x 3  ?

anonymous · Answer

i honestly do not know(im not lying) theres too much information in the problem

campbell_st · Answer

ok... can you find the window information in your question... not what you have typed above as see if you can find the size... it might be 3-feet -by-3feet... or 3-feet-by 1feet..
or something similar.

anonymous · Answer

okay1! it says he will not need to paint the single 3-foot-by-5-foot rectangular window in his room and the 3.5-foot-by-7-foot rectangular door.

campbell_st · Answer

ok... thats great thanks 

so 

Area to paint = Area - window - door

Area to paint = 600 - (3 x 5) -(3.5 x 7)

so Sergio needs to paint an area of 560.5 feet^2

does that make sense..?

anonymous · Answer

sorta....

campbell_st · Answer

so if a 1 gallon can of paint covers 300 to 350 ft^2... Sergio will need 2 cans of paint.

anonymous · Answer

ahhh ok then

anonymous · Answer

so what will my next step me then?

campbell_st · Answer

thats it... the question is what is the minimum number of cans sergio needs to buy... 

its up above.... just 2 cans of 1 gallon each.