If two rods of length L and 2L having coefficients of linear expansion alpha and 2 alpha respectively are connected so that total length becomes 3L, the average coefficient of linear expansion of the composite rod equals :

If two rods of length L and 2L having coefficients of linear expansion

1.	If two rods of length L and 2L having coefficients of linear expansion alpha and 2 alpha respectively are connected so that total length becomes 3L, the average coefficient of linear expansion of the composite rod equals :
Answer» `(3)/(2) ALPHA` `(5)/(2) alpha` `(5)/(3) alpha` `(3)/( 5) alpha` ANSWER :C