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?
A60 km/ h
B62 km/h
C58 km/h
D64 km/h
Answer:
A. 60 km/ h
Read Explanation:
Average Speed = Total distance travelled/Total time taken
Car covered first 100km at a speed of 50km/h
Time taken = 100/50 = 2
Next 140 km at speed of 70km/h
Time taken = 140/70 = 2
Total distance = ( 100 + 140 ) = 240km
Total time taken = 4 h
Average speed = 240 /4 = 60 km/h
