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