Hey there ..
I think the answer is as they put brake ..
I am not sure .. just check the image also provided above .. ..
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Answer:
Following are the description on the chain surveying:
Explanation:
The checking which is also called a beginning of the test is indeed a line uniting the summit of a triangular with other fixed locations from both sides of a triangle. To verify the overall precision of a framework, the check-line is measured. When assessed mostly on the ground, every length of an examination line should match its height. It also is called a proof line that connects the top of the triangle with any fixed location in the contrary direction. It is utilized for verifying the preciseness of a work.
Answer:
t = 59.37 s
Explanation:
Given data:
thermal diffusivity 
theraml conductivity = k = 22 W/m.K
h = 300 W/ m^2.K
= 25 degree C = 298 k
= 60 degree C = 333 k
= 75 degree C = 348 L
diameter d = 0.1 m
characteristics length Lc = r/3 = = 0.0166




at Bi = 0.226
Ai = 0.982




-1.187 = - 0.02t
t = 59.37 s