A boy runs 1 km in 12 minutes. How long will he take to run 400m ?
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Distance travelled = 1 km
= 1000 m
time taken = 12 minute
= 720 second
time taken for
400 m = (400 × 720 )/ 1000
= 288 second
= 4 minute 4 second or 4.8 minute
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