A car covers the first 80 Km of its journey at a speed of 40Km/h. The driver makes a stop at the tea-stall for 30 minutes and then continues his journey at a speed of 60 Km/h for 4 hours. What is his average speed (in Km/h, correct to 1 decimal place)?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 49.2.
80 km at 40 km/h → time = 2 hr
Break : 0.5 hr
4 hr at 60 km/h → distance = 240 km
Total Distance = 80 + 240 = 320 km
Total Time = 2 + 0.5 + 4 = 6.5 hr
Average speed = 320/6.5 = 49.2 kmph