A car travels 42km on 7 litres of petrol how far will it travel on 12litres

since the km/L ratio stays the same,

x/12 = 42/7
so just find x

42/7 = x/12

x = 12(42/7) = 72 km

(that's about 17 L/100km, awful consumption rate, I get about 8.5 on my Hyundai SUV)

12

To determine how far the car will travel on 12 liters of petrol, we first need to find the fuel efficiency (kilometers per liter) of the car.

By dividing the distance traveled (42 km) by the amount of petrol consumed (7 liters), we can find the fuel efficiency:

Fuel efficiency = Distance traveled / Petrol consumed
Fuel efficiency = 42 km / 7 liters
Fuel efficiency = 6 km/liter

Now that we know the fuel efficiency is 6 kilometers per liter, we can apply it to 12 liters of petrol to find out how far the car would travel:

Distance traveled = Fuel efficiency * Petrol consumed
Distance traveled = 6 km/liter * 12 liters
Distance traveled = 72 km

Therefore, the car will travel 72 kilometers on 12 liters of petrol.