If each side of a square is increased by 50% the ratio of the area of the resulting square to the area of the given square is__________?

A. 5:4
B. 9:4
C. 4:5
D. 4:9

Explanation:
Let original side be x metres, then area = x2 Sq.m
New side =(150% of x)m = (150/100 × x)m =(3x/2)m
New area =(3x/2 x 3x/2)m2 = 9×2/4 m2
Required ratio of area = 9×2/4 : x2 = 9:4