Alyssa has 4 litres of paint in 150 ml pots. She uses exactly eight pots to paint a picture. How many millilitres of paint does she have left?

Answer 1

Alyssa starts with 4 litres of paint in 150 ml pots. To find out how many pots that is, we first convert 4 litres to millilitres:

\[
4 \text{ litres} \times 1000 \text{ ml/litre} = 4000 \text{ ml}
\]

Next, we determine the number of 150 ml pots in 4000 ml:

\[
\frac{4000 \text{ ml}}{150 \text{ ml/pot}} = \frac{4000}{150} \approx 26.67 \text{ pots}
\]

Since the number of pots must be whole, Alyssa has 26 pots available. Next, we calculate how much paint Alyssa uses when she uses 8 pots:

\[
8 \text{ pots} \times 150 \text{ ml/pot} = 1200 \text{ ml}
\]

Now we subtract the used paint from the total amount to find out how much paint she has left:

\[
4000 \text{ ml} - 1200 \text{ ml} = 2800 \text{ ml}
\]

Thus, Alyssa has 2800 millilitres of paint left after using eight pots.