Question

A rectangle measuring 7cm by 4cm is enlarged by a ratio of 2:1.what is the area of the enlarged rectangle.

Answer 1

the new area is (7*2)(4*2)

Note that the area grows by the square of the magnification ratio

Answer 2

7*2/1 =14 cm

4*2/1= 8cm

.: the area of enlarged rectangle =14*8 =112cm^2

Answer 3

7cm×2