Question 6
A square has side length 5 cm. Its side length is doubled. Find (a) the ratio of the new area to the old area; (b) the ratio of the new perimeter to the old perimeter. Enter the two ratios as a;b.
Source wording conflict: the English text asks about area, while the Vietnamese text and worked solution ask about perimeter. This edition asks both, in the order area then perimeter.
Source wording conflict: the English text asks about area, while the Vietnamese text and worked solution ask about perimeter. This edition asks both, in the order area then perimeter.