Car moves with a speed of 80 km/h for 15 minutes and then with a speed of 60 km/h for the next 15 minutes. the total distance covered by the car is____.
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Explanation:
speed of a car in first 15 minutes = 80km /hr.
Speed of a car in next 15 minutes = 60km/ hr
Therefore, total time taken by car = (15 +15) min
= 30 minutes.
Total speed of a car = (80 + 60) km/ hr
= 140 km/ hr.
Total distance covered by a car = total time taken × total speed of a car
= (140 × 30) km = 420 km
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