Mathematics for IGCSE & O level - Proportion (Section 2 - No. 22)
The amount of fuel used by a car is directly proportional to the distance traveled. If a car uses 5 liters of fuel to travel 50 km, how many liters of fuel will it use to travel 120 km?
6
10
12
15
Vysvětlení
fuel=k*distance. 5=k*50; k=0.1; fuel=0.1*120=12 liters