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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

Respuesta :

mgreen3881

Answer:

p=28.2

Step-by-step explanation:

l=9.8

w=4.3

it was close tho

vidalmari6p99qfk

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

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