Mathematics for IGCSE & O level - Mensuration (Section 6 - No. 34)
A rectangle has an area of 40 cm² and a width of 5 cm. What is the length?
5 cm
8 cm
10 cm
200 cm
คำอธิบาย
Since area = length * width, then length = area / width = 40 cm²/5cm = 8 cm.