Question

aapka travel first 180 km and 72 km per hour and the next 180 kilometre at at 60 km per hour find the find the average speed of the first 360 km​

Answer 1

Answer:

65.45 km/hr

Step-by-step explanation:

Speed = Dist / time

T = T1 + T2

T1 = 180/72 = 2.5 hr

T2 = 180/60 = 3 hr

T = 2.5 + 3 = 5.5 hr

Avg  speed = Total Dist / Total time = (180 + 180)/T

= 360/5.5 = 65.45 km/hr

Answer 2

Answer:

360km/5.5h = 65.45km/h

Step-by-step explanation:

speed for first 180 km = s = 72kmph

time = distance/speed = 180/72 h = 2.5 h

speed for next 180 km = S = 60kmph

time = distance/speed = 180/60 h = 3h

total time = 3h + 2.5h = 5.5h

total distance = 360km

avg. speed = total distance / total time

= 360/5.5 kmph = 65.45 kmph