Paint needed

The janitor is to paint the computer room walls, which are 7 m long, 5 m wide and 3 m high. The classroom has four square windows with a length of 1 m and a door 1 m wide and 2 m high. At least how many kilograms of paint should he buy if 1 kg of paint passes per 15 m2?

Final Answer:

x =  5 kg

Step-by-step explanation:

a=7 m b=5 m c=3 m  S1=c (2 a+2 b)=3 (2 7+2 5)=72 m2 d=1 m S2=4 d2=4 12=4 m2 S3=1 2=2 m2 S=S1S2S3=7242=66 m2 s=15 m2 x=S/s=66/15=5 kg



Help us improve! If you spot a mistake, please let let us know. Thank you!







Tips for related online calculators
Do you want to round the number?

You need to know the following knowledge to solve this word math problem:

arithmeticsolid geometryplanimetryUnits of physical quantitiesGrade of the word problem

 
We encourage you to watch this tutorial video on this math problem: video1   video2

Related math problems and questions: