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taxi!

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by kanha81 » Fri May 01, 2009 2:43 pm
A taxi company charges f cents for the first mile of the taxi ride and m cents for each additional mile. How much does the company charge for a 10-mile taxi ride?

(1) The company charges $0.90 for a 2-mile ride.

(2) The company charges $1.20 for a 4-mile ride.
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by piyush_nitt » Fri May 01, 2009 4:47 pm
We need to find out the value of equation

f + 9m

1. f + m = 0.9

we cannnot determine the value of 2 variables from 1 equation. hence insuff.

2. f+3m = 1.2

Again we cannot determine the value

1+2 , we have 2 variables and 2 equations, so we can find out the value of f and m and on subsituting the value in f+9m we can determine the cost of trip

hence C.
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by kanha81 » Sat May 02, 2009 7:40 am
piyush_nitt wrote:We need to find out the value of equation

f + 9m

1. f + m = 0.9

we cannnot determine the value of 2 variables from 1 equation. hence insuff.

2. f+3m = 1.2

Again we cannot determine the value

1+2 , we have 2 variables and 2 equations, so we can find out the value of f and m and on subsituting the value in f+9m we can determine the cost of trip

hence C.
thanks piyush.
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