Atul walks 4 km at a speed of 2 km/h, runs 10 km at a speed of 6 km/h, and goes by bus for another 45 km. The speed of the bus is 30 km/h. Find the average speed of Atul.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 11 km/h.
Walking time = 4/2 = 2 hours
Running time = 10/6 = 5/3 hours
Bus time = 45/30 = 3/2 hours
Total distance = 4 + 10 + 45 = 59 km
Total time = 2 + (5/3) + (3/2) = 31/6 hours
Average speed = 59/(31/6) = 11 km/h