Multiple choice general knowledge

A farmer travelled a distance of 61 km in 9 hours. He travelled partly on foot @ 4 km/hr and partly on bicycle @ 9 km/hr. The distance travelled on foot is:

  1. 14

  2. 15

  3. 16

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

Let distance on foot = x km, then distance on bicycle = (61-x) km. Time on foot: x/4 hours. Time on bicycle: (61-x)/9 hours. Total: x/4 + (61-x)/9 = 9. Solving: 9x + 4(61-x) = 324, so 5x + 244 = 324, therefore x = 16 km.

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