A piece of rectangular grassland is 10.4m long and 5.6m width. All
measurements are correct to nearest 0.1m.
(a) Find the upper limit of the area (Unit : m^2)
(b) Find the lower limit of the area (Unit : m^2)
Maths!!!
2009-02-09 2:23 am
回答 (2)
2009-02-09 3:37 am
✔ 最佳答案
(a) upper limit of the length = 10.44mupper limit of the width = 5.64m
upper limit of the area = 10.44m*5.64m = 58.9m^2 (correct to nearest 0.1m)
(b) lower limit of the length = 10.35m
lower limit of the width = 5.55m
lower limit of the area = 10.35m*5.55m = 57.4m^2 (correct to nearest 0.1m)
2009-02-18 2:46 am
(a)
[10.4+(0.1/2)]*[5.6+(0.1/2)]
=10.45*5.65
=59.0425m^2
The upper limit of the area is 59.0425m^2
(b) [10.4-(0.1/2)]*[5.6-(0.1/2)
=57.4425m^2
The lower limit of the area is 57.4425m^2
[10.4+(0.1/2)]*[5.6+(0.1/2)]
=10.45*5.65
=59.0425m^2
The upper limit of the area is 59.0425m^2
(b) [10.4-(0.1/2)]*[5.6-(0.1/2)
=57.4425m^2
The lower limit of the area is 57.4425m^2
參考: myself(i don't dnow whether I need correct them to the 3 sign.fig or not)
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