Question

A water dispenser has 20 L of water, and there are 20 such water dispensers. To empty 20 L of water completely in 2 L bottles, how many such bottles need to be ordered?

• A. 300 bottles
• B. 200 bottles
• C. 400 bottles
• D. 100 bottles

Answer 1

The correct option is B 200 bottles

$\bullet$ Volume of 1 water dispenser = 20 L

$\bullet$ Volume of 20 such water dispensers = 20 × 20 L
= 400 L
$\bullet$ The capacity of 1 bottle = 2 L

$\bullet$ The number of bottles required to hold 400 L water = 400 L ÷ 2 L
= $\text{200 bottles}$

Hence, option A is correct.