Multiple choice

A farmer travelled a distance is $61$ km. an average speed of $4$ km/hr and partly on bicycle at an average speed of $9$ km/hr and total distance travel in $9$ hr, then find the distance travelled by him on foot.

  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 x be the distance travelled on foot. Then the bicycle distance is 61 - x, and the time equation is x/4 + (61 - x)/9 = 9. Solving gives x = 16 km.

AI explanation

Let the distance travelled on foot be x km, making the distance travelled on bicycle (61 - x) km. Using the formula Time = Distance / Speed, we get x/4 + (61 - x)/9 = 9. Multiplying by 36 gives 9x + 244 - 4x = 324, so 5x = 80 and x = 16. The distance travelled on foot is 16 km.

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