Multiple choice

The odometer of a car reads 57321.0 km when the clock shows the time 08:30 a.m. If at 08:50 a.m, the odometer reading has changed to 57336.0 km, calculate the speed of the car in km/hr during this time.

  1. 45 km/hr

  2. 90 km/hr

  3. 22.5 km/hr

  4. 15 km/hr
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A Correct answer
Explanation

Distance covered = 57336.0 - 57321.0 = 15 km. Time taken = 20 minutes = 20/60 hours = 1/3 hours. Speed = Distance / Time = 15 / (1/3) = 45 km/hr.

AI explanation

The distance covered is found by subtracting the initial odometer reading from the final reading, so 57336.0 km minus 57321.0 km equals 15 km. The time taken is from 08:30 a.m. to 08:50 a.m., which is 20 minutes or 20/60 hours. Using the formula Speed equals Distance divided by Time, the speed is 15 km divided by (1/3) hours, resulting in 45 km/hr.

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