A steel bridge is 1000m long at -20 degreesC in winter. What is the change in length when the temperature rises to 40 degreesC in summer?The...

Change in length of bridge is given by the formula:

L2 - L1 = L1*(t2 - t1)*E

Where:

L1 = Initial length of bridge = 1000 m (Given)

L2 = Final length of bridge

t1 = temperature in winter = -20 degrees C (Given)

t2 = temperature in summer = 40 degrees C (Given)

E = Coefficient of linear expansion = 11*(10^-6)/C degrees

Substituting these values in the above equation we get:

L2 - L1 = 1000*[40 - (-20)]*11*(10^-6) = 66*(10^-2) = 0.66 m

Therefore change in length is 0.66 m.

Thus option D0 is correct.