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The cost of sending a package is T cents for the first 1/4

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The cost of sending a package is T cents for the first 1/4 [#permalink] New post 11 Sep 2008, 10:57
The cost of sending a package is T cents for the first 1/4 kilogram and T/5 for each additional 1/4 kilogram or fraction thereof. What is the cost, in cents, to send a P kilogram package at this rate, where P is an integer greater than 1.

a) PT/20
b) (PT-1)/20
c) [(P/4)+1]T
d) [(16P-1)T]/20
e) [4T(P+1)]/5
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Re: Math Question [#permalink] New post 11 Sep 2008, 11:21
HVD1975 wrote:
The cost of sending a package is T cents for the first 1/4 kilogram and T/5 for each additional 1/4 kilogram or fraction thereof. What is the cost, in cents, to send a P kilogram package at this rate, where P is an integer greater than 1.

a) PT/20
b) (PT-1)/20
c) [(P/4)+1]T
d) [(16P-1)T]/20
e) [4T(P+1)]/5


im getting =>answer as :

IMO E
My strategy :
n=4p-1 - total number of 1/4 parts of p kilograms

and total cost = T+T/5*n

hence solve this get E
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Re: Math Question [#permalink] New post 11 Sep 2008, 17:14
Nice method. I wrote a much more complicated equation.
Re: Math Question   [#permalink] 11 Sep 2008, 17:14
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The cost of sending a package is T cents for the first 1/4

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