How many minutes does Arun take to cover a distance of 400 m, If he runs at speed of 20 km/hr? *
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Explanation:
speed = 20km/hr
= 20 × 1000/3600
= 500/9 m/s
time = distance/speed
= 400/500/9
= 400×9/500
= 7.20 min
ans. Therefore he will take 7 min 20sec to cover a distance of 400 m when he runs at a speed of 20km/hr
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