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      Question

      A bus was travelling at 55 km/hr. After ‘x’ hours, its

      speed increased by 12 km/hr and it continued for (x + 6) hours. If it covered 612 km in these (x + 6) hours, calculate the distance travelled in the first ‘x’ hours.
      A 190.15 km Correct Answer Incorrect Answer
      B 172.15 km Correct Answer Incorrect Answer
      C 128.15 km Correct Answer Incorrect Answer
      D 275.15 km Correct Answer Incorrect Answer

      Solution

      ATQ,

      67 × (x + 6) = 612

      Or, x + 6 = 9.13

      Or, x = 3.13

      Therefore, required distance travelled = 55 × 3.13 = 172.15 km

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