The distance between the towers at the ends of the main span of a bridge is 2400m.The sag of the cable half -way between the towers at 30^(@)C is 500m. If bar(alpha)=12xx10^(-6)K^(-1) for the cable, calculate the change in length of the cable betwen the towers and the change in sag midway between the towers for a change in temperature from 10^(@)C to 42^(@)C

The distance between the towers at the ends of the main span of a brid

1.	The distance between the towers at the ends of the main span of a bridge is 2400m.The sag of the cable half -way between the towers at 30^(@)C is 500m. If bar(alpha)=12xx10^(-6)K^(-1) for the cable, calculate the change in length of the cable betwen the towers and the change in sag midway between the towers for a change in temperature from 10^(@)C to 42^(@)C
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