the cost in petrol for the journey of 160 km is N150.
How to find the cost of petrol for a journey of 160 kilometers?
First, we know that the lorry uses 45 liters of petrol to travel a distance of 720 km, with these two values we can find how much it consumes to travel one kilometer.
That is given by the quotient between the volume of petrol consumed and the distance traveled.
R = 45L/720km = 0.0625 L per kilometer.
Then, to travel a distance of 160 km, the lorry will use:
V = (0.0625 L/km)*160km = 10 L
To travel a distance of 160km, the lorry needs 10 liters of petrol.
Here says that the cost of petrol is N15 (where I assume that N refers to the name of the coin used here)
Then the cost of the 10 liters of petrol is:
C = 10*(N15) = N150
This means that the cost in petrol for the journey of 160 km is N150.
If you want to learn more about costs:
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