Question

A tank has a capacity of 8,200 mL. If there is already $\frac{1}{2}$ L of water in the tank, then mL of water is required to fill it completely.

• A. 7,500
• B. 8,100
• C. 7,700
• D. 8,000

Answer 1

The correct option is C 7,700

$\text{Capacity of the tank}$ $\text{= 8,200 mL}$

$\text{Water available in the tank}$ $\text{=}\frac{1}{2}\text{L}$

$\text{Let's convert}$ $\text{liters to milliliters.}$

$\text{We know that,}$
$\text{1 liter =}$ $\text{1,000 milliliters}$


So,
$\frac{1}{2}\text{L =}$ $\frac{1}{2}$ $\times$ $\text{1000 mL}$

$=500\text{mL}$

$\text{Hence, out of 8,200 mL capacity}$ $\text{of the tank, 500 mL was already filled.}$

$\text{Now we have to find the remaining}$ $\text{amount of water to be filled in}$ $\text{the tank.}$

$\text{Amount of water to be filled}$ $\text{= Total capacity - water available}$


$\text{Thus, 7,700 mL of water is required}$ $\text{to be filled in the tank.}$