Question

Find the amount of paint left.

• A. 2300 mL
• B. 2100 mL
• C. 2400 mL
• D. 1000 mL

Answer 1

The correct option is B 2100 mL

$\text{Total amount of paint ordered = 5 L 500 mL}$
$\text{Amount of paint used by Roby = 2 L 100 mL}$
$\text{Amount of paint used by Andy = 1 L 300 mL}$

So,
Amount of paint left = Total amount of paint ordered – Amount of paint used by Roby and Andy

Amount of paint left = 5 L 500 mL – (1 L 300 mL + 2 L 100 mL)

Now,

Adding the units separately, we get:


So,


Subtracting the units separately, we get:


So, the amount of paint left = 2 L 100 mL

Now, 1 L = 1000 mL
⇒ 2 L = 2 × 1000 mL = 2000 mL

∴ Amount of paint left = 2000 mL + 100 mL = 2100 mL