Car travel 30 kilometre at uniform speed of 40 per hour next 30 kilometre uniform speed of 20 kilometre per hour find average speed
Answers
Answered by
6
Answer:
80/3 km/h
Explanation:
When car travels 30 km at speed 40 km/h
Time = 30/40 h
Time = 3/4 h
When car travels next 30 km at speed 20 km/h
Time = 30/20 h
Time = 3/2 h
Average speed = Total distance/ Total time
= 60/(3/4 + 3/2)
= 60/(9/4)
= (60 × 4)/9
= 80/3 km/h
Similar questions