object covers of 40 km in first 1/2 hour and 80 km in next 1/2 hour. calculate it average speed .please give process
Answers
Answered by
2
Step-by-step explanation:
Letx consider, x= total distance covered by the car,
Time taken to complete the half distance with velocity v=40km/h,
t
1
=
2×40
x
=
80
x
hr. . . . .(1)
The time taken to complete another half distance with velocity u=60km/h
t
2
=
2×60
x
=
120
x
hr
The total time taken, t=t
1
+t
2
t=
80
x
+
120
x
=
48
x
hr
The average speed of the car,
v
avg
=
x/48
x
=48km/h
Answered by
0
Answer:
60km/h is the average speed .
.
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