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posted by  paddy graham on 10/6/2008 1:59:07 PM  |  status: Live  

Is this what their asking for?

Course Textbook Chapter Problem
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Question Details:
The question is

From a piece of wire 5000 mm long, n pieces are cut, each piece being

10 mm longer than the previous piece. If ui is the length of the ith piece

and Si is the cumulative length of i pieces:

(i) express un and Sn in terms of u1 and n

(ii) if exactly 25 pieces can be cut from the wire, determine the length of

u1

(iii) determine the number of pieces that can be cut if u1 is 155 mm.

for i I get :
 
for ii I get :   a = 80mm
 
 
and for iii I get :  20 pieces
 
 
 
many thanks for your help paddy
 
 
 
 
 
 
 
 
 
 
 
 
 
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AAnswers:

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Guru
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posted by flame on 10/6/2008 2:28:30 PM  |  status: Live
Asker's Rating: Helpful   
paddy graham's comment:
"Thank you for your help sir I will put your wisdom to good use"
Response Details:
i) Un = U1 + 10(n-1)
   Sn =
         =
ii) is correct
iii) is also correct
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