A man takes half time in rowing a certain distance downstream than upstream. What is the ratio of the speed in still water to the speed of current?
A
1 : 2
B
2 : 1
C
1 : 3
D
3 : 1
Correct Answer: Option D
Explanation
Let's solve this the smart and quick way, just like we need to in the exam hall.
**Method 1: Using Logic and Options (Most Elegant)**
1. First, a bit of common sense. For the man to be able to row *upstream* at all, his own speed in still water must be