Advanced Mathematics Primary 3 Volume of Liquid

A graduated cylinder contains 560 mL of water. Priya pours the water into two beakers, A and B, until both beakers are full. Beaker A holds 3 times as much as Beaker B, and together they hold 240 mL. How much water is left in the graduated cylinder after filling both beakers?

A 320 mL
B 500 mL
C 380 mL
D 240 mL
Show Worked Solution

Worked Solution

Step 1: Use the ratio to find the volume of each beaker. Let Beaker B = 1 unit. Then Beaker A = 3 units. 1 unit + 3 units = 4 units = 240 mL. 1 unit = 240 ÷ 4 = 60 mL (Beaker B). Beaker A = 3 × 60 = 180 mL. Step 2: Find the total poured into both beakers. 60 + 180 = 240 mL. Step 3: Find the water remaining in the cylinder. 560 − 240 = 320 mL. Answer: 320 mL of water is left in the graduated cylinder.

Correct answer: 320 mL

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