Physics 2024 JAMB Past Questions - Question 39: Railway lines, 25 m long, are being laid when the temperature is 15 °C. Gaps of 1.8 cm are being left between them. At which temperature will they touch each other given that its coefficient of linear expansivity is 1.2 ×10^-5/°C. 

Railway lines, 25 m long, are being laid when the temperature is 15 °C. Gaps of 1.8 cm are being left between them. At which temperature will they touch each other given that its coefficient of linear expansivity is 1.2 ×10^-5/°C.