A boy covers a distance of20 km in 2.5 hours,partly on foot at the rate of 5km/hour and partly on bicycle at the rate of 10km/hour.find the distance covered on foot?
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Answer: 5 km.
Proof : he covers 5 km by foot, which takes 1 hr, and 15 km by bike, which, at 10 km/h takes 1.5 hrs to cover.
Together : 20 km in 2.5 hrs.
Proof : he covers 5 km by foot, which takes 1 hr, and 15 km by bike, which, at 10 km/h takes 1.5 hrs to cover.
Together : 20 km in 2.5 hrs.
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