Hi, i dont quiet understand the question however, is it referring to upper and lower limit? if it is then the solution is below:
5.8 is the lengths & it can go up or down by 0.1 so 0.1/2 = 0.05 therefore +/- 0.05
lower limit --> 5.8-0.05= 5.75 therefore 5.75x5.75= 33.0625m^2
upper limit --> 5.8+0.05= 5.85 therefore 5.85x5.85= 34.2225m^2
or either its refering to the upper and lower limit which is then 5.75 - 5.85.
I dont know if thats what the question is asking but if you got answers then post them up i will try work it out for you, hope it helped.
