Answer: A

0 < j < k

A: The time it takes to read k words at j words per minute

B: The time it takes to read (k + 10) words at (j + 10) words per minute

The only thing that we need is comparing fractions, disregarding the time (as time in both A and B is minute)

A: k /j

B: k+10 / j+10

If we have 1000/3 than we add 1000000 to both nominator and denominator, we will have:

1001000 / 1000003 which is going to 1, the more the added value is, the nearer the fraction is to 1.

By these we can say that k+10 / j+10 is nearer to 1 than k/j and as k is bigger than j, the fraction k/j is something more than 1, Thus, A is bigger than B.

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