Question

Okay can some one tell me where I am going wrong I don't understand how I am getting this wrong

QUESTION: THE LENGTHS OF THE RECTANGLE HAVE BEEN MEASURED TO THE NEAREST TENTH OF A CENTIMETER CALCULATE THE UPPER BOUND FOR THE PERIMETER OF THE RECTANGLE length: 9.8cm width: 4.3 cm

My workings:
1cm=0.05
9.8 - 0.05= 9.75
4.3-0.05= 4.25
9.75+4.25 = 14

MATHS WATCH IS TELLING ME IT IS WRONG CAN SOMEONE EXPLAIN PLEASE

Answer 1

p=28.2

Explanation:

l=9.8

w=4.3

it was close tho

Answer 2

Answer : 28.4 cm

Lower Upper

Length is given as 9.8 --> 9.75 ≤ L < 9.85

width is given as 4.3 --> 4.25 ≤ w < 4.35

Perimeter = 2L + 2w (Upper bound)

= 2(9.85) + 2(4.35)

= 19.7 + 8.7

= 28.4