The average speed of the student for his entire walk is equal to 1.5 m/s. Therefore, option (b) is correct.
What is the average speed?
The average speed of a body is calculated as the total distance traveled in a fixed interval of time. The average speed can be determined by dividing the total distance traveled by a body by the total time.
The average velocity is a single value if the object moves uniformly. Speed is a scalar quantity, it has no specified direction. The average speed has the S.I. unit the same as velocity i.e. m/s.
Given the distance covered by a student in first 80 sec = 100m
After stooping for 30sec again cover a distance of 200m in 90sec.
The total distance traveled by the student = 100 + 200 = 300m
The time taken by student to cover distance = 80 + 30 +90 = 200 sec
The average speed of the student = total distance/ total time taken
= 300/200 = 1.5 m/s
Therefore, the average speed of the student is equal to 1.5m/s.
Learn more about average speed, here:
brainly.com/question/12322912
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(I think)
Answer:
Step-by-step explanation:
120*15%= 18 off
120-18= $102.00 new price
Answer:
I have no idea i need help too, but this five points on brainly is worth it.
Step-by-step explanation:
*shrugs*
Adding the student with eight siblings will increase the class average amount of siblings because this student has more siblings than the average.
Therefore, the average number of siblings that each student has is larger than the original average.