Question

A container holds 2 L of solution. 750 mL is extracted from it. Finally, 1.5 L of solution is added to the container. The net quantity is .

• A. 2.75 L
• B. 275 mL
• C. 2.75 mL

Answer 1

The correct option is A 2.75 L

Initially, the container holds 2 L of the solution.

750 mL of solution is extracted from it. Hence, we need to subtract.

Finally, 1.5 L of the solution is added to it.

We need to perform $\text{2 L - 750 mL + 1.5 L}$ to get the net quantity.

As addition and subtraction are of same priority, we start from left and move towards the right.

Let's perform 2 L - 750 mL first.

To subtract two quantities, we first need to make them like terms.

We know, 1000 mL = 1 L
$\Rightarrow$ 1 mL = $\frac{1}{1000}$ L
$\Rightarrow$ 750 mL = $\frac{750}{1000}=0.75$ L

Now, let's perform the subtraction.
$\to$ 2 L - 0.75 L

$\therefore 2\text{L}-750\text{mL}+1.5\text{L}=(2\text{L}-0.75\text{L})+1.5\text{L}=1.25\text{L}+1.5\text{L}$


The net quantity in the container is $2.75\text{L}$