Mathematics for IGCSE & O level - Proportion (Section 1 - No. 12)
The volume of a gas, *V*, is inversely proportional to its pressure, *P*. If *V* = 10 cubic units when *P* = 2 atm, what is *V* when *P* = 5 atm?
4
5
20
25
คำอธิบาย
V=k/P. 10=k/2, k=20. V=20/P. If P=5, V=20/5 = 4