Question

A rod of metal X of length 50.0 cm elogates 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 0.08 cm for the same rise in temperautre. 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.

1) The coefficients of linear expansion of metal X and of metal Y are in the ratio of
a) 2:1
b) 3:2
c) 3:1

2) The length of the rod of metal X in the composite piece is
a) 10 cm
b) 20 cm
d) 40 cm
c) 30 cm

3) The length of the rod of metal Y in the composite piece is
d) 40 cm
b) 20 cm
a) 10 cm
c) 30 cm​

Answer 1

Step-by-step explanation:

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