# 3. A bedroom wall is 3m long and 2m high. What is the total area of the wall? A can of paint will cover 10m². How many cans are ne

Question

3. A bedroom wall is 3m long and 2m high. What is the total area of the wall? A can of paint will cover 10m². How many cans are needed if each wall needs 2 coats of paint?​

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1 month 2022-12-21T09:33:25+00:00 1 Answer 0 views 0

1. Total area of wall = 24 m² and the number of cans of paint required is 4.8 cans

### How to solve

Given data
length = 3 m
width = 2 m
a can of paint will cover 10 m²
each wall needs 2 coats of paint
Area of a wall
= 3 * 2
= 6 m²
Assuming 4 walls, total area
4 * 6 = 24 m²
paints required:
since each wall needs 2 coats of paints then 1 can of paint will cover 5 m². for each wall which is 6 m² we have:
1 can = 5 m²
?  =   6 m²
let x represent the number of cans for 6 m² then for x, we cross multiply
x = 6/5
x = 1.2 cans
for 4 walls we have
4 * 1.2 = 4.8 cans
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