Akl drove s car with speed of 20km/h wle going to s college when he returned to s home along the same route the speed of the car is 30km/h calculate the average speed of the car during entire the journey
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Let the distance travelled by Akhil be s km .
Time taken by Akhil while going to the college = t1 = s/30 hr
Time taken by Akhil while coming from the college =t2 = s/20 hr
Total time taken = t1 + t2 =t = ( s/30) + (s/20)
Total distance travelled = 2s
Average speed = Total distance travelled /total time taken
= 2s/ [ ( s/30) + (s/20)]
= 2 / (1/12)
= 24km/hr
Hence the average speed of the car = 24km/hr
Time taken by Akhil while going to the college = t1 = s/30 hr
Time taken by Akhil while coming from the college =t2 = s/20 hr
Total time taken = t1 + t2 =t = ( s/30) + (s/20)
Total distance travelled = 2s
Average speed = Total distance travelled /total time taken
= 2s/ [ ( s/30) + (s/20)]
= 2 / (1/12)
= 24km/hr
Hence the average speed of the car = 24km/hr
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