To find the distance traveled by the motorcar, we can use the formula:
Distance = Speed x Time
Let's calculate the distance for each half of the journey:
First half of the journey:
Speed = 21 km/h
Time = 10/2 = 5 hours
Distance for the first half = Speed x Time = 21 km/h x 5 hours = 105 km
Second half of the journey:
Speed = 24 km/h
Time = 10/2 = 5 hours
Distance for the second half = Speed x Time = 24 km/h x 5 hours = 120 km
Total distance traveled by the motorcar = Distance for the first half + Distance for the second half = 105 km + 120 km = 225 km
Therefore, the correct answer is C) 224.