a body covers half of its journey with a speed of 60 m/s and the other half with a speed of 40 m/s.find the average speed during the whole journey
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Answered by
10
Average= sum of given number ÷ 2
60+40 ÷2
100÷2
50
therefore average speed is 50m\s
60+40 ÷2
100÷2
50
therefore average speed is 50m\s
Answered by
6
hey buddy herr is ur answer....
suppose he goes x m.
then x/2 covers with 60m/s
other x/2 with the 40m/s then
1st case
t'=d/v
t'=x/120
t''=x/80
then t=x/72
now Vavr. =d/t=x/x/72
then Vav.=72m/s
suppose he goes x m.
then x/2 covers with 60m/s
other x/2 with the 40m/s then
1st case
t'=d/v
t'=x/120
t''=x/80
then t=x/72
now Vavr. =d/t=x/x/72
then Vav.=72m/s
spyranger66:
I didn't understand what you wrote
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