A car moves through 20 km at a speed of 40 km/h, and the next 20 km at a speed of 60
km/h. calculate its average speed.
Answers
Answered by
3
Hope you like it.
average speed of first
distance = 20 km
speed = 40 km/h
time taken = 20/40 = 1/2 hrs
2nd time average
distance = 20 km
speed = 60 km/h
time taken by the car is = 20/60 = 1/3 hrs
total time taken = t1+t2 = 1/2 +1/3 = 5/6 hrs
Average speed of the car is = (20+20)/(5/6)
= 48 km/h >===========================< ANSWER
Read more on Brainly.in - https://brainly.in/question/38322#readmore
average speed of first
distance = 20 km
speed = 40 km/h
time taken = 20/40 = 1/2 hrs
2nd time average
distance = 20 km
speed = 60 km/h
time taken by the car is = 20/60 = 1/3 hrs
total time taken = t1+t2 = 1/2 +1/3 = 5/6 hrs
Average speed of the car is = (20+20)/(5/6)
= 48 km/h >===========================< ANSWER
Read more on Brainly.in - https://brainly.in/question/38322#readmore
sabrina765:
thank u
Can also be done using the formula 2XY/X+Y. x=40y=60, 2*40*60/40+60=4800/100. Ans 48
nice
Answered by
4
Average speed=speed1+speed2
case-1
speed=40km/h
Distance=20km
Time=20km÷40km/h=1/2h
case-2
speed=60km/h
Distance=20km
Time=20km÷60km/h=1/3h
Total distance travelled=20km+20km=40km
Total time taken=1/2h+1/3h=5/6h
Average speed= 40km÷5/6h=48km/h
case-1
speed=40km/h
Distance=20km
Time=20km÷40km/h=1/2h
case-2
speed=60km/h
Distance=20km
Time=20km÷60km/h=1/3h
Total distance travelled=20km+20km=40km
Total time taken=1/2h+1/3h=5/6h
Average speed= 40km÷5/6h=48km/h
thank u
But , sorry this answer is wrong.The actual answer is 48km/h.It was a great mistake
okay
I don't think my answer is brainiest.
are you there Sabrina
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