Arace car completes a lap on a 1600 m long track with an average speed of 250 km/h. if the car's average speed on the first half of the track was 210 km/h, what was its average speed (in km/h) on the second half? km/h

A race car completes a lap on a 1600 m long track with an average speed of 250 km/h. If the car's average speed on the first half of the track was 210 km/h, 290 km/hr was its average speed on the second half.

Explanation:

The car in order to complete the race of 1600 m took an average speed of 250 km/ hr. given that the average speed of first half of the race was 210 km/hr. The second half average speed can be calculated as per the following method,

Given that total average speed of the car in race=250 km/hr.

Average speed in first half of race= 210 km/hr.

As we know that,

average speed =

Thereby, we have,

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