Multiple choice

A former traveled a distance of 61 km in 9 hrs.He travels partly on foot @ 4 km/hr. and partly on bicycle @ 9 km/hr.The distance traveled on foot is -

  1. 14 km.

  2. 15 km.

  3. 16 km.

  4. 17 km.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let distance on foot be d km. Then distance on bicycle = (61-d) km. Time on foot = d/4 hours, time on bicycle = (61-d)/9 hours. Total time: d/4 + (61-d)/9 = 9. Solving: 9d + 4(61-d) = 324, so 9d + 244 - 4d = 324, giving 5d = 80, thus d = 16 km.

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