+0  
 
+10
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avatar+1833 

SHOW ALL WORKING OR YOUR ANSWER WILL BE WRONG BECAUSE I SAID SO.

 

Rice is sold in 75-gram packs and 120-gram packs.

The masses of both packs are given correctly to the nearest gramme.

 

Calculate the lower bound for the difference in mass between the two packs.

 Feb 11, 2017

Best Answer 

 #3
avatar+25978 
+5

Agreed,,,I guess the question needs to specify what limits of rounding are  ( you could go to 75.499999999999999...) and what practical weight measurements are available in manufacturing and packaging !    I felt 100mg was 'practical'    LOL

 Feb 11, 2017
 #1
avatar+25978 
+4

75 grams can be UP to 75.4   or as LOW as 74.5   and still be rounded to 75 gm

120                      UP to 120.4          LOW as 119.5                                      120

 

120.4  - 74.5 = max diff = 45.9

MIN diff = 119.5 - 75.4 =  44.1 gm

 Feb 11, 2017
 #2
avatar+110154 
+5

EP    I think the bottom one should go up to  75.4999999 = 75.5

 

Rice is sold in 75-gram packs and 120-gram packs.

74.5  to  75.5                               119.5 to 120.5

 

lowest possible difference = 119.5 - 75.5 = 120-75-1 = 44g

 Feb 11, 2017
 #3
avatar+25978 
+5
Best Answer

Agreed,,,I guess the question needs to specify what limits of rounding are  ( you could go to 75.499999999999999...) and what practical weight measurements are available in manufacturing and packaging !    I felt 100mg was 'practical'    LOL

ElectricPavlov  Feb 11, 2017

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