2/4 and 1/2
5/10 and 1/2
1/3 and 2/6
40/90 and 4/9

First let

, so that

to write the integral as

Now recall that

, so substituting

should do the trick. The integral then becomes
A LmN > ; mqp by sas is the right answer
I think that they will meet in 3 hours and 11 min but I’m not too sure
Write the ratio as a fraction in the fourth column of the table.