A particle travel one third of the total distance of the journey with speed 10 metre per second the next one third of the total distance with speed 20 metre per second and the remaining distance with speed 40 metre per second the average speed of the particle for the journey is
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Answered by
0
Answer:
Let the total distance travelled be x km Then total time taken =
10
x/3
+
20
x/3
+
60
x/3
=
30
x
+
60
x
+
180
x
=
180
6x+3x+x
=
180
10x
=
18
x
hrs Then average speed = =
Totaltimetaken
Totaldistancetravelled
=
x/18
x
km/hr = 18 km/hr
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