Question

Railway lines 25m long are being laid when the temperature is 15°c. Gaps of 1.8 cm are being left between them. If ∝ = 12 x 10 (power)-6 / °C, The temperature at which they will touch each other is ?

A. 25°C
B. 50°C
C. 75°C
D.100°C

Answer 1

Answer:

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