A boy leaves his house at …
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Yogita Ingle 4 years ago
distance = 2 km
total time = 30 min = 0.5 hour
initial speed = 3km/h for first 1 km
Hence time taken = distance/speed = 1/3 h
time left = 0.5 - 1/3 = 0.5/3 h
distance left = 1 km
Hence speed at which he should walk the second km wouldeb 1/(0.5/3) = 6 km/h
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