If the side of a square is doubled, find the ratio of resulting square to that of
the given square.

4: 1

step-by-step explanation:

let the side of square be a

the area of this square is a*a=a^{2}

now the side is doubled i.e. 2a

now area of new formed square is 2a*2a=4a^{2}

now the ratio is   4a^{2} : a^{2} \\=4: 1:

your answer would be b

step-by-step explanation:

it has changed from the width and the height.

step-by-step explanation: