A backyard pool is 41.625 meters. If the legnth is 3.7 and the height is 1.5 what is the width.

Do you mean 41.625 cubic meters?

 

If that is what you meant, then:

volume = (length)(width)(height)

41.625 = (3.7)(width)(1.5)

41.625 = (5.55)(width)

41.625/5.55 = width

7.5 meters = width