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Q.

To expel hot air out of the kitchen, A has an exhaust fan fitted to the window of her kitchen and B has a similar exhaust fan fitted on the wall near the ceiling of her kitchen. Which exhaust fan will expel the hot air more effectively?


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a

Exhaust fan of A

b

Exhaust fan of B

c

Both expel at the same rate

d

None 

answer is B.

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Detailed Solution

The exhaust fan of B will expel the hot air more effectively.
The kitchen window is at a lesser height when compared to the kitchen ceiling. Therefore, B's exhaust fan will expel the hot air more effectively because the hot air rises quickly, and B's fan is higher than A's.
 
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