Question

the lengths of the rectangle have been measured to the nearest tenth of a metre work out the following, writing down all the figures on your calculator display: a) The upper bound for the perimeter of the rectangle. b)The lower bound for the area of the rectangle. rectangle lengths = 15.8m width = 5.2m

Answer 1

Answer: Perimeter = 42.2 m

Area = 81.1125 m²

Explanation:

Lower Upper

Length is given as 15.8 --> 15.75 ≤ L < 15.85

width is given as 5.2 --> 5.15 ≤ w < 5.25

Perimeter = 2L + 2w (Upper bound)

= 2(15.85) + 2(5.25)

= 31.7 + 10.5

= 42.2

Area = Length x width (Lower bound)

= 15.75 x 5.15

= 81.1125