The volume decreases by approximately 0.04 m³

Explanation:

Considering that there is no change in pressure or the number of moles, we can use Boyle's law here, which states that

1 V Ρα

or

P₁V₁ = P₂V₂

Since we need to solve for the change in volume, we might as well find the new volume first.

V₂ P₁V₁ P2 =

Plugging in the values:

V₂ 50, 000, 000 Pa. 0.25 m³ 60,000,000 Pa = ≈ 0.21 m³

Now, we need to find the change in the volume, that is

AV = V₂ - V₁

We got:

Delta*V = 0.21m ^ 3 - 0.25m ^ 3

Delta*V = - 0.04m ^ 3

That means, that the volume has decreased by 0.04 m³.