Answer: Jim is taller
Analysis
We have to analyse in three ways
1. Jim and Hari in the same row.
2. Jim and Hari in the same column
3 . Jim and hari are in differnt row and column.
case 1: If Jim and Hari are in the same column, then Jim is taller than Hari because Jim is the tallest in that column.
case 2 : If they are in the same row, then Hari is shorter than Jim because Hari is the shortest in that row.
case 3 : If Jim and Hari are in different column and row, How to proceed ?
We have to figure out some common point of reference.
Choose a person say Mani who is at the intersection of Jim's row and Hari's column.
Now compare Jim and Mani ,
As we have selected tallest people in each column Jim is taller than Mani, ----- A
Now compare Mani and Hari
As we have selected shotest people in each row Hari is shorter than Mani
(Means) Mani is taller than Hari.------ B
Combining A & B
Jim is taller than Mani ; Mani is taller than Hari
Goes with out saying
Jim is the tallest.