1692-1284 = 408 meters travelled in 8 seconds
408/8 = 51 meters per second is his rate of speed.
51 x 29 = 1479 meters
BUT he was 1284 meters away, so by traveling 1479 meters, he passed her.
1479 - 1284 = 195 meters past her.
He is 195 meters away from Lois at 29 seconds.
Now we could argue, since Superman is not a fool, he would’ve stopped at Lois. But that’s not what your math teacher is looking for ;)