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a car travels from place A to the place B at 20 km/hour and returns at 30 km/hour.The average speed of the car for the whole journey is |
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Answer» the distance between A and B is x km. Speed of the car from A to B(U) = 20 km/hr. Therefore, time(T1) = x/20 Also, Distance between B and A = x km. Speed of the car from B to A(v) = 30 km/hr. time(T2)= x/30 Thus, total time = T1 + T2 = x/20+ x/30 = x/12 hr. total distance covered by the car = x + x = 2X Using Formula, AVERAGE Speed = Total distance/Total time = 2x/(x/12) = 24 km/hr. Thus, average speed of the car is 24 km/hr.Hope it will help u. mak as brainliest |
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