a car travelled 100k. m distance with a speed of 60kmph. and 200kmph. distance with a speed of 45kmph. what is the average speed to cover the total distance?
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Average speed = Total distance / Total time.
1st case = time = DISTANCE / SPEED.
= /60
= 10/6 SEC
2ND CASE
= TIME = DISTANCE \ SPEED
TIME = 200/45
time = 40/9
so total time = 10/6 + 40/9
30+80/18
110/18
now speed = 300/ 110/18
5400/110
49.09m/s
1st case = time = DISTANCE / SPEED.
= /60
= 10/6 SEC
2ND CASE
= TIME = DISTANCE \ SPEED
TIME = 200/45
time = 40/9
so total time = 10/6 + 40/9
30+80/18
110/18
now speed = 300/ 110/18
5400/110
49.09m/s
Answered by
1
Hey guy ! Your answer is given. Hope it help.
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How is the answer.
wrong
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