Lena is tiling a square floor with each

Question

side 3 metres long. Tiles cost $45 per
square metre.
Which calculation gives the total cost of
tiling the floor (in dollars)?

Answer 1

First calculate area of square room
side = 3m
Area = side*side m²

From unit price = $45/m², calculate
Total Cost = unit price * area

Answer 2

30

Answer 3

45x6