Question

The area of a figure is 13 square inches. If all the dimensions of the figure are multiplied by 4, the area of the figure will be multiplied by _____.

5
12.5
625
50

Answer 1

Let the dimensions of original square be

length=l
width=w
so, l*w=13 square inches .......(1)

Answer 2

the dimension of final square is

length=4 l
width=4 w

final area =4l*4w=16l*w=16(original area).

Answer 3

4² = 16
so 16 is correct answer