The new volume : V₂ = 1185.9 cm³
Further explanation
Given
V₁ = 571 cm³
T₁ = 260 K
T₂ = 540 K
Required
The new volume (V₂)
Solution
Charles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature

Input the value :
V₂ = V₁.T₂/T₁
V₂ = 571 x 540 / 260
V₂ = 1185.9 cm³