To calculate James' speed, we need to use the formula:
Speed = Distance ÷ Time
We know that James traveled a distance of 126km and it took him 1 and 3/4 hours.
First, we need to convert the mixed number 1 and 3/4 to an improper fraction:
1 and 3/4 = (4 x 1 + 3) / 4 = 7/4
So, James' time in hours is:
1 and 3/4 hours = 7/4 hours
Now we can substitute the values into the formula:
Speed = Distance ÷ Time
Speed = 126km ÷ 7/4 hours
To divide by a fraction, we can multiply by its reciprocal:
Speed = 126km x 4/7 hours
Speed = 72km/h
Therefore, James' speed was 72km/h.
It took James 1 and 3/4 hrs to travel a distance of 126km in his car. Calculate his speed in km/h
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