The correct answers are the 3rd and 4th ones.
You make them to improper fractions then you find a greatest common factor and then go from there
It is going robe f help me ?
First, we get the area of each tile: (100 cm = 1m)
.20 m* .15 m = 0.03m^2
Then, we solve for the total area of the wall:
5m*3m= 15m^2
Then we divide
15/0.03 = 500 tiles
