The height of a meeting room that's measures 19 m by 12 m is 3 m. Glen plans to apply 2 coats of paint to the walls of the room. A 4 L can of paint covers about
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Question
The height of a meeting room that's measures 19 m by 12 m is 3 m. Glen plans to apply 2 coats of paint to the walls of the room. A 4 L can of paint covers about 30m
What is the surface area of the walls to be painted? How many cans of paint will Glen need?
What is the surface area of the walls to be painted? How many cans of paint will Glen need?
1 Answer

1. User Answers apologiabiology
so this meeting room is 3 by 19 by 12
surface area/wall area=2(height times width)+2(height times depth)+2(width times depth)
lets say 3=height
depth=19
width=12
2(3 times 12)+2(3 times 19)+2(12 times19)=2(36)+2(57)+2(228)=72+114+456=642
2 coats of paint so surface area times 2
642 times 2=1284
assuming 30m means 30 square meters we divide 1284 by 30 and get
1284/30=42 and 4/5 or 42.8
then find how many cans by dividing by 4
42.8/4=10 and 1.4/2=10.7, but you cant buy 0.7 of a can so round up and get
11 cans of paint
he needs 11 cans of paint