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A van has an 80-L fuel tank and a fuel efficiency rating of 12.2 L / 100 km.
(a) How far can the van travel on one t full tank of fuel?
(b) How much fuel would the van use on a 325-km trip?
(c) If the cost of gasoline is $1.55/L, how much does it cost to fill up the tank of this van?
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(a) Use this proportion
= .
From this proportion, find the unknown distance x
x = kilometers. At this point, use your calculator.
(b) Use this proportion
= .
From this proportion, find the unknown volume of fuel y
y = liters. At this point, use your calculator.
(c) To find the cost of filling the tank, multiply the tank volume (80 L) by the price of the fuel, per liter.
Solved / explained / instructed.
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On proportions, see the lessons
- Proportions
- Using proportions to solve word problems
- Typical problems on proportions
- Using proportions to estimate the number of fish in a lake
- HOW TO algebreze and solve these problems using proportions
- Problems on proportions for mental solution
in this site.
Happy learning ( ! )