subedisworp21 subedisworp21

21-05-2024
Physics

Answered

(Its urgent please! I will give 20 points)A car driver completed the first 20 km of a 40 km trip at an average speed of 50 km/hr. At what average speed must the car driver complete the remaining 20 km to achieve an average speed of 60 km/hr for the 40 km trip? Find your answer in km/hr.

Answer :

jsimpson11000 jsimpson11000

21-05-2024

Answer:

Explanation:

Total distance = 40 km

total distance / avg rate = time

40 km / 60 km / hr = 2/3 hr total time

First 20 km takes 20km / 50 km/hr = 2/5 hr

2/3 hr - 2/5 hr = 4/15 hr to travel 20 km

20 km / (4/15 hr) = 75 km / hr required

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