Answer:
a) 34m/s
b) 42.5 m/5
Step-by-step explanation:
The average speed is the distance divided by the time. This is:
Vaverage = 1700m/50s=34 m/s
The value of K is, knowing that the area under the curve is 1700
k*30+k*20/2=1700
30k + 10k = 1700
40k=1700
k=42.5
