Ali travels a distanc of 300 m in 2 minutes and 30 seconds .What is his speed in kmph ?
A. 6.9
B. 7.1
C. 7.2
D. 7.3

Options

A. C
B. B
C. A
D. D

Answer

To find Ali's speed in kilometers per hour (km/h), we can follow these steps:

### Step 1: Convert the time from minutes and seconds to seconds
Ali travels for 2 minutes and 30 seconds.
- Convert 2 minutes to seconds:
\[ 2 \text{ minutes} = 2 \times 60 = 120 \text{ seconds} \]
- Add the additional 30 seconds:
\[ 120 \text{ seconds} + 30 \text{ seconds} = 150 \text{ seconds} \]

### Step 2: Use the formula for speed
The formula for speed is:
\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \]
Here, the distance is 300 meters and the time is 150 seconds.

### Step 3: Calculate the speed in meters per second (m/s)
Substituting the values into the formula:
\[ \text{Speed} = \frac{300 \text{ meters}}{150 \text{ seconds}} = 2 \text{ m/s} \]

### Step 4: Convert the speed from meters per second to kilometers per hour
To convert from m/s to km/h, we use the conversion factor:
\[ 1 \text{ m/s} = 3.6 \text{ km/h} \]
Thus,
\[ \text{Speed in km/h} = 2 \text{ m/s} \times 3.6 = 7.2 \text{ km/h} \]

### Final Answer
The speed of Ali is:
\[ \text{Speed} = 7.2 \text{ km/h} \]
Thus, the correct option is C. 7.2.

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