Edexcel Gcse Mathematics (Linear) - Upper And Lower Bounds Page 5
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86.
A field is in the shape of a rectangle.
The width of the field is 28 metres, measured to the nearest metre.
(a)
Work out the upper bound of the width of the field.
......................... metres
(1)
The length of the field is 145 metres, measured to the nearest 5 metres.
(b) Work out the upper bound for the perimeter of the field.
......................... metres
(3)
(Total 4 marks)
7.
Steve measured the length and the width of a rectangle.
He measured the length to be 645 mm correct to the nearest 5 mm.
He measured the width to be 400 mm correct to the nearest 5 mm.
Calculate the lower bound for the area of this rectangle.
Give your answer correct to 3 significant figures.
2
............................ mm
(Total 3 marks)
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