Question
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 :
Answer: Option C
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Let the distance travelled on foot be `x` km
Then , distance travelled on bicycle = `(61 - x)` km.
So, `x/4 + ((61 - x))/(9) - 9 hArr 9x + 4(61 - x) = 9 xx 36 hArr 5x = 80 hArr x` = 16 km.
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