The coefficient of linear expansion 'a' of a rod of length 2m varies with the distance x from the end of the rod as a = a₂ + ax where a₂ = 1.76 x 10⁻⁶/°C and ax = 1.2 x 10⁻6 m/°C. The increase in the length of the rod, when heated through 100°C is: (A) 2cm (B) 3.76mm (C) 1.2 mm (D) None of these
