A car uses 15 litres of petrol in 45 minutes. How many litres of petrol will it use in 1 hour
To find out how many litres of petrol the car will use in 1 hour, we first need to calculate how many litres it uses in 1 minute.
15 litres / 45 minutes = 0.33 litres per minute
Now, we can find out how many litres of petrol the car will use in 1 hour:
0.33 litres/minute * 60 minutes = 19.8 litres
Therefore, the car will use 19.8 litres of petrol in 1 hour.