Anand leaves his house at 8:30 a.m. for his school the school is 2 kilometre away and classes start at 9:00 a.m. if he walks at a speed of 3 km per hour for the first kilometre at what speed should he walk 2nd kilometre to reach just in time
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distance = 2 km total time = 30 min = 0.5 hourinitial speed = 3km/h for first 1 kmHence time taken = distance/speed = 1/3 h time left = 0.5 - 1/3 = 0.5/3 hdistance left = 1 km Hence speed at which he should walk the second km would be 1/(0.5/3) = 6 km/h
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