A person walks at 5 km/h for 2 hours and then jogs at 8 km/h for 1 hour. What is the average speed?
Show answer & explanation
Correct answer: A
Explanation
Distance covered in the first 2 hours = 5 × 2 = 10 km
Distance covered in the next 1 hour = 8 × 1 = 8 km
Total distance = 10 + 8 = 18 km
Total time = 2 + 1 = 3 hours
Average speed = Total distance / Total time
= 18/3
= 6 km/h