Passage - I: A rod of metal X of length 50.0 cm elongates by 0. 10 cm when it is heated from 0°C to 100°C. Another rod of metal Y of length 80.0 cm elongates by 0.08cm for the same rise in temperature. A third rod of length 50 cm, made by welding pieces of rods X and Y placed end to end, elongates by 0.03 cm when its temperature is raised from 0°C to 50°C. The coefficients of linear expansion of metal X and of metal Y are in the ratio of

Passage - I: A rod of metal X of length 50.0 cm elongates by 0. 10 cm

1.	Passage - I: A rod of metal X of length 50.0 cm elongates by 0. 10 cm when it is heated from 0°C to 100°C. Another rod of metal Y of length 80.0 cm elongates by 0.08cm for the same rise in temperature. A third rod of length 50 cm, made by welding pieces of rods X and Y placed end to end, elongates by 0.03 cm when its temperature is raised from 0°C to 50°C. The coefficients of linear expansion of metal X and of metal Y are in the ratio of
Answer» `2:1` `3:2` `3:1` `4:3` ANSWER :A