Question 38279
LET D BE THE DISTANCE BETWEEN THE 2 SHIPS & BWCAUSE THIS PROBLEM CAN BE REPRESENTED BY A RIGHT (90 DEGREE)TRIANGLE THEN A~2+B~2=D~2 SO

20~2+30~2=D~2 OR 400+900=D~2 OR 1300=D~2 OR D=SQRT1300 OR D=36.06 MILES AFTER 1 HOUR.

2 HOURS AFTER THEY LEAVE THEY ARE D~2=(2*20)~2+(2*30)~2 OR D~2=40~2+60~2 OR 

D~2=1600+3600 OR D~2=5200 OR D=SQRT5200 OR D=72.11 MILES APART