At first, a container contained
34 ℓ of water. Cathy added another
15 ℓ of water into the container. Then she used
319 of all the water in the container. How much water did Cathy use? Express your answer as a fraction in its simplest form.
Total volume of water in the container after Cathy added more water into the container
= 34 + 15
= 1520 + 420
= 1920 ℓ
19 u = 1920
1 u = 1920 ÷ 19 = 1920 x 119 = 120
Volume of water that Cathy used
= 3 u
= 3 x 120
= 320 ℓ
Answer(s): 320 ℓ