Two containers, one unit
A bar-model problem comparing a jug and several glasses to find the volume each one holds.
The Question
A jug holds 3 times as much as a glass. Together, one jug and 4 glasses hold 2,100 ml. How much does the jug hold?
The Answer
Reveal the Answer
Draw the jug as 3 units and each glass as 1. That is 7 units in total, so 1 unit = 2100 ÷ 7 = 300 ml and the jug is 3 × 300 = 900 ml. Counting the units correctly is the whole question.
Now watch the solution
Practice Sheet + Marked Answers
The four-question practice sheet, the solutions in our teaching voice and a self-marking quiz for this question are part of The Question Desk course — every school day of the term, with progress you can see. Enrolled group students get it included.
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