A car drove from Agra to Delhi without stopping It covered the first 50 miles of its journey at an a...........

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A car drove from Agra to Delhi without stopping. It covered the first 50 miles of its journey at an average speed of 25 mph. What was the car’s average speed (in mph), for the remaining 130 miles if its overall average speed was 45 mph?

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Explanation:

Average speed = total /total time
Total distance = 50 + 130 = 180 miles
∴ Total time = 180/45 = 4 hrs
Time spent for the first 50 miles = 50/25 = 2 hrs
∴ Time spent on the remaining journey = 4 − 2 = 2 hours
∴ Average speed for the remaining 130 miles = 130/2 = 65 kmph