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1 gallon of paint covers 300 ft how many gallons I needed for a room 30 ft long 20 ft wide by 12 ft high

Sagot :

Answer:

6 gallons

Step-by-step explanation:

the total area to be painted :

= The total surface area - area of the floor

= area of the walls + area of the ceiling

area of the walls :

= [perimeter of the room] ×height

= [2 × (30+20)] × 12

= 1 200

area of the ceiling :

= length × width

= 30 × 20

= 600

the total area to be painted :

= 1200 + 600

= 1800

The number of gallon of paint needed to cover the room :

= 1800 ÷ 300

= 6