Question

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Answer 1

Explanation:

Average Speed = Total distance/total time

distance1 = 15km

speed1 = 30km/h

time1 = distance/speed = 15/30 = 1/2h

distance2 = 75km

speed2 = 50km/h

time2 = distance/speed = 75/50 = 3/2h

Average Speed = (d1 + d2)/(t1 + t2)

avg speed = (15 + 75)/(1/2 +3/2)km/h

avg speed = 90/2 = 45km/h

Answer 2

Answer:

45 km/h

Explanation:

Time 1 = d/s = 15/30 = 1/2hrs

Time 2 = 75/50 = 3/2 hrs

Total time = 1/2+3/2= 4/2 =2 hrs

Total Distance = 75+15 = 90

Average speed = Total distance/ Total Time

= 90/2 = 45 km/h

Hope helps

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