a car consumes 1litre of petrol for every 15km travelled and the price of petrol is per litre.calculate the total petrol cost to travel 285km

Question

anonymous · Answer

What is the price? You kinda missed out on that info.

anonymous · Answer

I used ratio to solve this one.

Let x= the number of liters used to travel 285 km.

1 liter: 15 kms= x liters: 285 km
Then multiply the means ( 15 and x) and the extremes (1 and 285)
 
15x=285
Divide both sides by 15 to get x.

x= 19. You need 19 liters for 285 kms. Now you just have to multiply 19 to the price per liter to get the total cost of petrol.