4 PRINT "TIME - SPEED - DISTANCE EXERCISE"\PRINT
   5 RANDOMIZE
  10 C=INT(RND(1)*25)+40
  15 D=INT(RND(1)*15)+5
  20 T=INT(RND(1)*19)+20
  25 PRINT " A CAR TRAVELING"C"MPH CAN MAKE A CERTAIN TRIP IN"
  30 PRINT D"HOURS LESS THAN A TRAIN TRAVELING AT"T"MPH."
  35 PRINT "HOW LONG DOES THE TRIP TAKE BY CAR";
  40 INPUT A
  45 V=D*T/(C-T)
  50 E=INT(ABS((V-A)*100/A)+.5)
  55 IF E>5 THEN 70
  60 PRINT "GOOD!  ANSWER WITHIN"E"PERCENT."
  65 GOTO 80
  70 PRINT "SORRY.  YOU WERE OFF BY"E"PERCENT."
  80 PRINT "CORRECT ANSWER IS"V"HOURS."
  90 PRINT
  95 PRINT "ANOTHER PROBLEM (YES OR NO)";
 100 INPUT A$\PRINT
 105 IF A$="YES" THEN 10
 999 END