Mathematics for IGCSE & O level - Ratio And Proportion (Section 4 - No. 2)
If 2 kg of apples cost $5.00, what is the cost of 7 kg of apples?
$12.50
$15.00
$17.50
$20.00
Paaiškinimas
cost per kg = 5 / 2 = 2.5. Therefore, cost of 7 kg = 7 * 2.5 = $17.50