Question

Only for scholars please tell me answer of this question in easy way but Step-by-step I will add your answers in brain list but solve step by step

Answer 1

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l1 = length at 15℃
l2= length at 30℃
t1= 1st temperature
t2=2nd temperature
a= Coefficient of Iron = 12×10^-6
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l2=l1×{1+a(t2-t1)}

l2 =324×{ 1+ 12×10^-6 (30-15)

l2 = 324 × (1 + 180×10^-6)

l2= 324 + 58320 ×10^-6

l2 = 324 +.05832

l2= 324.05832 meter

Increase in length
= 324.058-324
= 0.058 m

increase in length of Eiffel tower is.05832×100= 5.8cm