An algebra problem by farsin sakkeer

Algebra Level pending

The car hire charges in a city comprise of a fixed charges together with the charge for the distance covered. For a journey of 12 km, the charge paid is $ 89 and for a journey of 20 Km,the charge paid is $ 145. What will a person have to pay for travelling a distance of 30 Km ?

$ 897 $ 682 $ 154 $ 215

Farsin Sakkeer by farsin sakkeer , 22, Qatar

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2 solutions

Unstable Chickoy
Jun 16, 2014

let

x x - be the fixed charged

y y - charge per distance covered

x + 12 y = 89 x + 12y = 89

x + 20 y = 145 x + 20y = 145

x = 5 ; y = 7 x = 5 ; y = 7

For 30km

5 + 30 ( 7 ) = 215 5 + 30(7) = \boxed{215}

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nice computation :3. Mine is - I add both the dollar and km.

so: $89 + $145 = $234 while 12km + 20km = 32km

32km = $234 .. since, it $215 was the nearest answer. Then, I answered this. Sorry for my very simple computation

Kimberly Villarmente - 6 years, 12 months ago

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san ka sa taguig?

Unstable Chickoy - 6 years, 12 months ago
Tanya Gupta
Jun 13, 2014

I haven't struck upon the actual solution yet.... But the cost averages around 7.2$ per km...so for 30km it comes round 210....$215 being the closest option

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