Mathematics for IGCSE & O level - Proportion (Section 2 - No. 43)
The volume of a gas is inversely proportional to its pressure. If a gas occupies 10 liters at a pressure of 2 atmospheres, what volume will it occupy at a pressure of 5 atmospheres?
2 liters
4 liters
5 liters
25 liters
คำอธิบาย
Since V = k/P, then 10 = k/2 and k = 20. If P = 5, V = 20/5 = 4 liters.