Chances are high that CAT 2021 might give surprises in QA. Over the years the pattern has shifted from pure calculation based questions to pure logic based ones. So, handle the questions accordingly and ensure a proper balance between attempt and accuracy.
CAT 2021 is being conducted in November 2021 this year. Practice with following Question and answer with solution for Quantitative Analysis (QA):
A conical vessel, with a circular base, is filled with water to two-thirds of its volume. The pointed end of the cone is snipped off and replaced with a lid. The lid is kept open for 10 hours every day during which some water evaporates. The volume of the water that evaporates on a day is directly proportional to the area of the water surface at the beginning of the day. The volume of the water left in the container after evaporation on the 1st day is half the volume of the original cone. If V is the volume of the original cone, then what is the volume of the water that evaporates on the 2nd day?
Solution:
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