# In which tumbler do you expect the water to cool down faster?

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You are provided with two tumblers A and B one narrow and the other wide, as shown in the diagram. Both contain the same amount of hot water whose initial temperature is the same. Now you keep them open on a sunny day under similar conditions.

In which tumbler do you expect the water to cool down faster?

posted Oct 16, 2018

+1 vote

the tumbler B, because the free surface is wider, therefore the amount of hot water evaporated will be higher thus increasing the cooling down as compared to tumbler A

answer Oct 20, 2018 by anonymous

B as it has larger surface area with same volume

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