Two metals P and Q are heated through the same temperatur...
Two metals P and Q are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of their
length is 3: 4 respectively, the ratio of the increase in lengths of P to Q is
1:2
2:1
8:9
9:8
Correct answer is A
P: αhθαhθ
2×3×θ3×4×θ
12