Question

How long must the side of the square be in order that its area be four times the area of square whose side is 7?

Answer 1

Answer:

The side of square should be 14 cm so that it's area is four times of the square having side 7cm

Step-by-step explanation:

let the squares be A1 and A2

Side of square A1 = 7cm

Area of the square A1 = s*s = 7*7=49cm

Area of the square A2 = 4(Area of A1)

Therefore, Area of the square A2 = 4(49) = 196

we know that,

$area \: of \: a \: square \: = {side}^{2}$

therefore,

$196 \: = {side}^{2} \\ side \: = \sqrt{196} \\ side \: = 14cm$