Using the Ohm’s circuit, for determination of resistnace of a wire made of an alloy of constant temperature coefficient of resistance (α) , a student obtained the resistance of the wire at 0°C, at 100°C and at t°C as 3.14 Ω , 3.54 Ω and 3.42 Ω respectively. The temperature t is
(1) 60°C
(2) 70°C
(3) 80°C
(4) 90°C