A swimmer wants to cross a 600 m wide river . If the speed of swimmer is 12 km/hr in still water and speed of river is 6km/hr , along what direction the swimmer must strike in order to cross the river straight ? Also, calculate his resultant velocity and time taken by him to do so .

Explanation

To solve the problem of the swimmer crossing the river, we can break it down into several steps:

### Step 1: Understand the Problem
The swimmer wants to cross a river that is 600 m wide. The swimmer's speed in still water is 12 km/hr, and the river's current speed is 6 km/hr. We need to find the angle at which the swimmer should swim to cross the river straight, the resultant velocity, and the time taken to cross.

### Step 2: Convert Units
First, we need to convert the width of the river from meters to kilometers for consistency with the speeds given in km/hr.
- Width of the river = 600 m = 0.6 km
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