A 20 m chain was found to be 10 cm long after chaining a distance of 200 m. It was found to be 18 cm too long at the end of days’ work. After chaining a total distance of 400 m, what is the true distance if the chain was corrected before the commencement of days’ work?
1
396.2 m
2
401.9 m
3
398.1 m
4
403.8 m