Multiple choice

A car travels first 39 km distance in 45 minute while next 25 km distance in 35 minutes. What is its average speed?

  1. $45$ km/h
  2. $35$ km/h
  3. $48$ km/h
  4. $90$ km/h
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Total distance = 39 + 25 = 64 km. Total time = 45 + 35 = 80 minutes = 80/60 hours = 4/3 hours. Average speed = 64 / (4/3) = 64 * 3 / 4 = 16 * 3 = 48 km/h.

AI explanation

The average speed is calculated as the total distance divided by the total time taken. The total distance is 39 km plus 25 km, which equals 64 km. Converting the time to hours gives 45 minutes plus 35 minutes, which is 80 minutes or 4 divided by 3 hours. Dividing 64 km by (4 divided by 3) hours gives an average speed of 48 km/h.

Keep practicing — related questions