Question

A rectangle with a length of 5 cm and a width of 2 cm is enlarged by a scale factor of 5. What would be the area of the new rectangle?

Area of old rectangle is multiplied by 25
Area of old rectangle is multiplied by 5
Area of old rectangle is multiplied by 20
Area of old rectangle is multiplied by 10

Answer 1

Answer: Area of old rectangle is multiplied by 25

Explanation:

Original rectangle

• Length = 5 cm
• Width = 2 cm

Area = 2 · 5 = 10 cm²

New rectangle

• Length = 5 · 5 = 25 cm
• Width = 2 · 5 = 10 cm

Area = 25 · 10 = 250 cm²

The area of the new rectangle = area of old rectangle × 25

Answer 2

Area is in square units.

Square the factor: 5^2 = 25

The new area would be the area of the old rectangle multiplied by 25