A train goes with a speed of 20 m/s . what is the speed of train in km/min?

Options

A. 1.2
B. 12
C. 1200
D. 120

Answer

To convert the speed of the train from meters per second (m/s) to kilometers per minute (km/min), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the given speed**:
The speed of the train is given as 20 m/s.

2. **Convert meters to kilometers**:
We know that 1 kilometer (km) is equal to 1000 meters (m). Therefore, to convert meters to kilometers, we can use the conversion factor:
\[ 1 \text{ m} = \frac{1}{1000} \text{ km} \]
So, to convert 20 m to kilometers:
\[ 20 \text{ m} = 20 \times \frac{1}{1000} \text{ km} = \frac{20}{1000} \text{ km} = 0.02 \text{ km} \]

3. **Convert seconds to minutes**:
We know that 1 minute is equal to 60 seconds. Therefore, to convert seconds to minutes:
\[ 1 \text{ s} = \frac{1}{60} \text{ min} \]

4. **Calculate the speed in km/min**:
Now we need to express the speed in km/min. Since we have 20 m/s, we can convert it to km/min as follows:
\[ \text{Speed in km/min} = 0.02 \text{ km/s} \times 60 \text{ s/min} \]
\[ = 0.02 \times 60 = 1.2 \text{ km/min} \]

5. **Final Answer**:
The speed of the train in kilometers per minute is 1.2 km/min.

### Summary:
The speed of the train is 1.2 km/min.