Volume of a rectangular solid is given by length ×width ×height or the base area × height. In this case the base is a square hence the base area = a cm ×a cm = a² cm² therefore, the volume will be a² cm² ×b cm = a²b cm³ hence, a²b cm³ = V cm³ dividing both side by b , a² = V/b , then we get the square root therefore, a = √(V/b)
