A pump started filling an empty pool with water and continued at
a constant rate until the pool was full. At noon the pool was 1/3 full,
and 1+1/4 hours later it was 3/4 full. What was the total number of
hours that it took the pump to fill the pool?

A. 2+1/3
B. 2+2/3
C. 3
D. 3+1/2
E. 3+2/3

i am surprised my answer wasn't there.Am i missing something.