Question
A motorbike travelled for the first 180 km at a certain
speed in 4 hours. After that, the speed of the motorbike decreased by 5 km/h. If the motorbike took a total of 9 hours to reach its destination, then find the total distance travelled by the motorbike.Solution
ATQ, Speed of the motorbike by which it travelled 180 km = 180/4 = 45 km/h Time taken to cover the remaining distance = 9 - 4 = 5 hours Decreased speed of the motorbike = 45 - 5 = 40 km/h Distance travelled with decreased speed = 40 × 5 = 200 km Therefore, required distance = 180 + 200 = 380 km
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