Question 1107059
W = kXY/V²

Step 1: Find k;  W = 1200 ; X=4; Y=9
 1200 = k (4)(9)/(6)²

1200 = k(36)/36

k = 1200

Step 2: k = 1200; W = ?  X=3;  Y=12;  V=9

W = kXY/V²
W = (1200)(3)(12)/(9)²

W =  43,200/81

W =  533 and 27/81  or  533 1/3