Question 1168382
in 1 hour, A digs (1/8) of hole and in x hours, he digs (x/8) of a hole
B digs (x/9) of a hole in x hours by the same reasoning,.Together, they dig 1 hole.
So (x/8)+(x/9)=1
9x+8x=72
17x=72
x=72/17=4.24 hours

in that time, A digs (4.24/8) and B digs (4.24/9) of the hole, 53/47.