A car left from a Place A at 8:12 am and reached the Place B, 180 miles…
2023
A car left from a Place A at 8:12 am and reached the Place B, 180 miles distant at 11:57 am. What was its average speed in miles per hour ?
- A.
45
- B.
70
- C.
48
- D.
60
Attempted by 20 students.
Show answer & explanation
Correct answer: C
Solution: calculate the time taken and then divide the distance by that time.
Total distance = 180 miles.
Departure = 8:12 am; Arrival = 11:57 am.
Time taken = 11:57 − 8:12 = 3 hours 45 minutes = 3 + 45/60 = 3.75 hours = 15/4 hours.
Average speed = distance ÷ time = 180 ÷ (15/4) = 180 × 4/15 = 48 miles per hour.
Therefore, the average speed is 48 miles per hour.