A car covers the first 210 km at a speed of 70 km/h. It covered the next 170 km at a speed of 85 km/h. What is its average speed?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 76 km/h.
Time taken to cover 210 km = 210/70 = 3 hours
Time taken to cover 170 km = 170/85 = 2 hours
Average speed = Total distance/Total time
⇒ 380/5 = 76 km/hr