You need to work out how many seats you can fit in an area of the arena for an upcoming 5 a-side football match.

The formula to use is: number of seats = lw/0.5

(when l means length and w means width)

Using the measurements below work out how many seats are needed.

15m = length

3m = Width

1. The problem gives you the formula to calculate the number of seats, which is:

number of seats=lw/0.5

x=lw/0.5

Let's call the number of seats "x".

"l" is the length (l=15 meters).

"w" is the width (w=3 meters).

2. Then, you only have to substitute these values into the formula x=lw/0.5, as below:

x=lw/0.5

x = (15x3) / 0.5

x=45/0.5

3. Therefore the number of the seats is:

x=90 seats