Answer:
one bus travels at 66mi/hr and the other bus at 49mi/hr
Explanation:
Let's assume one bus, A is traveling at x mi/hr and the other bus, B at x+17 mi/hr
after 3hrs, bus A will have covered 3x miles and bus B will have covered 3(x+17) miles.
the buses are 345 mils apart but from the same origin,
meaning Distance of A + Distance of B =345 miles
3x+3(x+17)=345
x=49
for bus A
and x+17=66 for bus B