Question
A farmer traveled a distance of 61 km in 9 hours. He
traveled partly on foot at the rate of 4 km per hour and partly on bicycle at the rate of 9 km per hour. The distance travelled on foot is:Solution
(x/4) + [(61 – x)/9] = 9 9x + 4 × 61 – 4x = 36 × 9 5x + 244 = 324 x = 80/5 = 16 km
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