A car covers the first 41 km of its journey in 45 min and covers the remaining 23 km in 35 min. What is the average speed (in m/sec) of the car?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 13 1/3.
The car covers 1st 41 km in 45 min and the remaining 23 km in 35 min.
Average speed = Total distance/Total time
km/h × (5/18) = m/sec
Total distance covered = 41 km + 23 km = 64 km
Total time = 45 minute + 35 minute = 80 min = 4/3 hours
Average speed = 64/4/3 = 48 km/hr = 48(5)/18 = 13 1/3 m/s