Question

If a steel reils are being laid in 30m lengths for an a new train line on a day when the temperature is 20°C, what is the appropriate width of the gap where one length meets the next,if the rail temperature can go as high as 56°C? Ghe linear expansion of steel is 1.2*10^-5K^-1.

Answer 1

Answer:

28m

Explanation:

this is really hard to explain