a car travels the first half of a distance between two places at speed of 30km/h the second half of distance at 50km/h. find the avg speed of the car for the whole journey
Answers
Answered by
330
let the total distance be 2x
therefore the car travel s first half distance I.e. x with 30 km/hr
time = x/30 hr
the car travel s second half of the distance I.e x with 50km/hr
time = x/50 hr
now,
average speed= total distance travelled/total time taken
= 2x/x/30+ x/50
= 2x/5x+3x/150
= 2x/8x*150
= 150/4
= 37.5km/hr
therefore the car travel s first half distance I.e. x with 30 km/hr
time = x/30 hr
the car travel s second half of the distance I.e x with 50km/hr
time = x/50 hr
now,
average speed= total distance travelled/total time taken
= 2x/x/30+ x/50
= 2x/5x+3x/150
= 2x/8x*150
= 150/4
= 37.5km/hr
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Answered by
58
Answer:
Explanation:let the total distance be 2x
therefore the car travel s first half distance I.e. x with 30 km/hr
time = x/30 hr
the car travel s second half of the distance I.e x with 50km/hr
time = x/50 hr
now,
average speed= total distance travelled/total time taken
= 2x/x/30+ x/50
= 2x/5x+3x/150
= 2x/8x*150
= 1/4*150
=37.5
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