Question

the amount of air present in a cylinder when a vacuum pump removes 1/4 of the air remaining in the cylinder at a time​

Answer 1

Answer:

Air already present in cylinder = $\frac{4}{4}= 1$

Air removed by vacuum pump = $\frac{1}{4}$

Remaining air = $1-\frac{1}{4} = \frac{4-1}{4} = \frac{3}{4}$

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Answer 2

Answer:

Step-by-step explanation:

Air alreafy present=1

Air removed =1/4

Air remaining = 1-1/4= 3/4