A car drove a distance of 189km in 4 and 1/2 hrs. What is his average speed
Show workings bit by bit
To find the average speed of the car, we need to divide the total distance traveled by the time taken to travel that distance.
Average speed = Total distance / Time taken
Here, the total distance traveled by the car is 189 km and the time taken to travel that distance is 4 and 1/2 hours.
To convert 4 and 1/2 hours into a fraction, we can multiply the whole number (4) by the denominator of the fraction (2) and add the numerator (1). This gives us:
4 and 1/2 hours = (4 x 2) + 1 / 2 = 9/2 hours
Now we can substitute the values into the formula:
Average speed = Total distance / Time taken
Average speed = 189 km / 9/2 hours
To divide by a fraction, we can multiply by its reciprocal:
Average speed = 189 km x 2/9 hours
Average speed = 42 km/hour
Therefore, the average speed of the car is 42 km/hour.