A car moves with a speed of 30 km (h) -1 for half an hour, 25 km (h) -1 for one hour and 40 km h -1 for two hours. Calculate the average speed of the car.
Answers
Answered by
6
avg speed= 40 + 25 + 30 / 3
avg speed = 95 / 3
avg speed = 31.6 km / h
avg speed = 95 / 3
avg speed = 31.6 km / h
Answered by
18
T1= 1/2 hr ,. T2= 1hr. ,. T3=2hr
Distance = Speed× Time
D1= 30× 1/2 = 15km
D2 = 25× 1 = 25km
D3 = 40×2 = 80km
Total Distance Travelled = 15+25+80 = 120km
Total Time = 1/2+1+2 = 7/2hr
Average speed= Total distance/ Total time
Average Speed = 120/ (7/2) = 120×2/7
= 240/7 km/h
Or 34.28 km/h
Distance = Speed× Time
D1= 30× 1/2 = 15km
D2 = 25× 1 = 25km
D3 = 40×2 = 80km
Total Distance Travelled = 15+25+80 = 120km
Total Time = 1/2+1+2 = 7/2hr
Average speed= Total distance/ Total time
Average Speed = 120/ (7/2) = 120×2/7
= 240/7 km/h
Or 34.28 km/h
Similar questions