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A Man travelled a distance of 61 km in 9 hours. He travelled partly on foot at 4 km/hr and partly on bicycle at 9 km/hr. What is the distance travelled on foot?

Correct answer: C. 16 km

  • A. 12 km
  • B. 14 km
  • C. 16 km
  • D. 18 km

Explanation

Let the distance travelled on foot be x km, so the bicycle distance is (61 - x) km. The time equation is x/4 hours + (61 - x)/9 hours = 9 hours; multiplying by 36 gives 9x + 244 - 4x = 324, so x = 16 km. The likely wrong choice is 14 km, which does not satisfy the total-time equation.

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