# Math Help - Question on square metres?

1. ## Question on square metres?

Tina wants to buy some pool tiles. Bob is selling some with each sheet measuring 49cm x 31cm. Each sheet has 228 squares (19 x 12 squares) and each single tile measures 25mm x 25mm. There are 97 sheets in total.

How many square metres does Bob have?
Tina needs 120 square metres, is there enough?

Tina wants to buy some pool tiles. Bob is selling some with each sheet measuring 49cm x 31cm. ... There are 97 sheets in total.

How many square metres does Bob have?
Tina needs 120 square metres, is there enough?
1. 49 cm = 0.49 m ....... and ....... 31 cm = 0.31 m.

Therefore: The area of one sheet is: $a_{sheet} = 0.49 \cdot 0.31 = 0.1519\ m^2$

2. There are 97 sheets. Thus the total area is: $a_{total} = 97 \cdot 0.1519\ m^2 = 14.7343 \ m^2$

3. To cover an area of 120 m² you need:

$n=\dfrac{120\ m^2}{0.1519\ m^2 } \approx 790 \ sheets$