{"question":"A container measures 15 cm by 15 cm by 8 cm.<br>It contains water to a depth of 2 cm at first.<br>The container was then placed below a leaking tap.<br>The graph shows the volume of water that leaked into the container over 3 hours (about 450 cm\u00b3 at 6 a.m., 600 cm\u00b3 at 7 a.m., 750 cm\u00b3 at 8 a.m., 900 cm\u00b3 at 9 a.m.).<br>(a) What was the volume of water in the water tank at first? <input type=\"text\" id=\"input_0\" class=\"fill-blank-input\" placeholder=\"?\" \/> cm\u00b3<br>(b) Water continued to leak into the container at the same rate.<br>The container was removed from the tap when it was completely filled.<br>At what time will the container be completely filled?","answer0":"450","answer1":"3 p.m.","question_image":"p5\/images\/maha-bodhi-2023-p5-end-of-year-exam-q44.png"}