A man covers a distance of 20 km in 3.5 hours partly by running and partly by walking. If he walks at 4 kmph and runs at 10 kmph, find the distance he covers by walking. Time, Speed, and Distance
Q1. A man covers a distance of 20 km in 3.5 hours partly by running and partly by walking. If he walks at 4 kmph and runs at 10 kmph, find the distance he covers by walking. Time, Speed, and Distance
Answer: 10 km
Explanation: Let walking time = t hours; 4t + 10(3.5 − t) = 20 gives t = 2.5 h; walking distance = 4 × 2.5 = 10 km.