X=4
cross multiply
3x=12
x=4
the answer is:
42.5
......
i commented the explanation in my answer
704 ( I'm assuming this is rectangular prism )
Follow this formula:
width x length x height = volume
Base is height x length so half of the problem is solved. Next just multiply that by the width and you found your answer.
The frequency is 1 /period = 1 / [ 2 pi ]
