Tirupati travels 120 km at the speed of 48 km/hr and another 180 km at the speed 45 km/hr. What is Tirupati’s average speed (in km/hr) during the entire journey? (correct up to two decimal places)
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 46.15.
Average speed = Total distance ÷ Total time
Total distance = 120 + 180 = 300 km
Time for first part = 120 ÷ 48 = 2.5 hours
Time for second part = 180 ÷ 45 = 4 hours
Total time = 2.5 + 4 = 6.5 hours
Average speed = 300 ÷ 6.5 ≈ 46.15 km/hr