The odometer of a car reads 57321.0 km when the clock shows the time 8.30 AM. What is the distance moved by the car if at 8.50 AM, the odometer reading has changed to 57336.0 km ?
Calculate the speed of the car in `km//min` during this time.

Options

A. 45 km/hr
B. 55 km/hr
C. 30 km/hr
D. 60 km/hr

Explanation

To solve the problem step by step, we will follow these instructions:

### Step 1: Determine the initial and final odometer readings.
- The initial odometer reading at 8:30 AM is 57,321.0 km.
- The final odometer reading at 8:50 AM is 57,336.0 km.

### Step 2: Calculate the distance moved by the car.
- To find the distance traveled, subtract the initial odometer reading from the final odometer reading:
\[ \text{Distance} = \text{Final Odometer Reading} - \text{Initial Odometer Reading} \]
\[ \text{Distance} = 57,336.0 \, \text{km} - 57,321.0 \, \text{km} = 15.0 \, \text{km} \]

### Step 3: Determine the time interval.
- The time interval from 8:30 AM to 8:50 AM is 20 minutes.

### Step 4: Calculate the speed of the car.
- Speed is calculated using the formula:
\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \]
\[ \text{Speed} = \frac{15.0 \, \text{km}}{20 \, \text{min}} = 0.75 \, \text{km/min} \]

### Final Answer:
- The distance moved by the car is **15.0 km**.
- The speed of the car is **0.75 km/min**.

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