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A car moves for half of its time at 80km/hr and for rest half of timeat 40km/hr. Total distance covered is 60km.What is the ave...Asked by Aadithya
A car moves for half of its time at 80km/hr and for rest half of time at 40km/hr.The total distance covered is 60km.What is the average speed of the car?
Answers
Answered by
Damon
time t at 80
time t at 40
80 t + 40 t = 60
120 t = 60
t = (1/2) hour at each speed
distance = 80(1/2) + 40(1/2) = 60km
av speed = 60 km/1 hour
time t at 40
80 t + 40 t = 60
120 t = 60
t = (1/2) hour at each speed
distance = 80(1/2) + 40(1/2) = 60km
av speed = 60 km/1 hour