A 30 m chain was tested before measurement of the days work and found to be correct After measuring 3000 m the chain was found to be 5 cm too long At the end of days work after measuring 5400 m the chain was found to be 10 cm too long What

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## A 30 m chain was tested, before measurement of the days work and found to be correct. After measuring 3000 m, the chain, was found to be 5 cm too long. At the end of days work after measuring 5400 m, the chain was found to be 10 cm too long. What

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: (i) Actual length of chain (L) = 30 m.
chain length after measuring distances of 3000 m
measured distance = 3000 m
Incorrect length of chain (L’)=3 0+(0+0.05)/2=30.025 m
True distance = measured distance X (L’/L)
3000 * (30.025 / 30.00) = 3002.5 m.
ii) Remaining measured distance = 5400-3000
= 2000 m
Incorrect length of chain (L’)= 30+(0.05+0.10)/2=30.075 m
True distance = measured distance X (L’/L)=2000X(30.075/30)=2005 m
Total transmittance = 3002.5+2005
= 50007.5 m

manjarimattur

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