Answer:
20 tiles
Step-by-step explanation:
Given that,
number of walls needed to be painted = 3
volume of one shower wall = 4 x 6 x 7
= 168 feet³
volume of 3 shower wall = 3 x 168
= 504 feet³
1 foot = 12 inches
504 foot³ = 6048 inches³
volume 4x4 tiles will cover for 3 walls = 3(4 x 4 x 7)
= 336 inches³
The number of tiles to fill the area = 6048 inches³/ 336 inches³
= 18 tiles
10% more than the number of tiles to fill the area in case any tiles break or need to be cut, or replaced later
18 + (18 x 10/100)
= 19.8
≈ 20 tiles
