A bus travels 90 km in 2 hours and returns in 3 hours. What is the average speed?
Show answer & explanation
Correct answer: B
Explanation
Distance (outward) = 90 km
Distance (return) = 90 km
Total distance = 90 + 90
= 180 km
Total time = 2 + 3
= 5 hours
Average speed = Total distance ÷ Total time
= 180 ÷ 5
= 36 km/h