A car has to covers 280km in 5hour.for the first three hours it travels at a speed of 50km/hour.what should be it's speed after that to reach the destination in the desired time
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the distance travelled in first three hours is 50 * 3 = 150 km
distance left = 280 - 150 = 130 km
speed needed = 130/2 = 65km/hour.
distance left = 280 - 150 = 130 km
speed needed = 130/2 = 65km/hour.
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