A car runs 18 km using 1 litre of petrol. How much distance will it cover using 7 1\4 litres of petrol ?
how about 18 * 7 1/4 ?
To find out how much distance the car will cover using 7 1/4 liters of petrol, we can set up a proportion:
Distance covered / Amount of petrol used = Distance covered / Amount of petrol used
Let's first convert 7 1/4 liters to an improper fraction.
7 1/4 = (7 * 4 + 1) / 4 = 29/4
Now we can set up the proportion:
x / 29/4 = 18 / 1
To solve for x (distance covered), we can cross multiply:
x = (18 * 29) / 4
Now, let's calculate x:
x = 522 / 4 = 130.5 km
Therefore, the car will cover a distance of 130.5 km using 7 1/4 liters of petrol.