Explain why holes are made in hangingss and hoardings.
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Holes are made in hoardings and hangings because of the property that air exerts pressure.when air comes with a great pressure on the Holdings or hangings it causes a great damage to them. so to prevent this holes are made on hoardings and hangings to make air pass through it and there is no chance of air exerting pressure on this hoardings and hangings and holes are not made because air passes through them without exertion of pressure.
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