A car covered the first 100 km at a speed of 50 km/h. It covered next 140 km at a speed of 70 km/h. What is its average speed?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 60 km/ h
Formula used
The average speed = Total distance covered/ total time taken
Calculation
Average speed = (100 + 140)/[(100/50) + (140/70)] = 240/4 = 60 km/h