3. A field is in the shape of a rectangle. The length of the field is 340 m, to the nearest metre. The width of the field is 117 m, to the nearest metre. Calculate the upper bound for the perimeter of the field.
m
4. 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.
mm2