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:

[A]. 14 km

[B]. 15 km

[C]. 16 km

[D]. 17 km

✅ The correct answer is option C.
Let the distance travelled on foot be x km.
Then, distance travelled on bicycle = (61 -x) km.

So,
x
+
(61 -x)
= 9

4
9

9x + 4(61 -x) = 9 x 36
5x = 80
x = 16 km.

103. 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: