Hari takes 20 min to walk 3 km .if shyam walks 20% faster then Hari then how much time will he take to cover the same distance?
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Answer:16min 40sec
Step-by-step explanation:
speed of Hari = distance/time
=3000/1200 = 2.5m/sec
speed of Shyam = 2.5 + (0.2×2.5) = 2.5 + 0.5 = 3m/sec
now, for Shyam
time = distance/speed = 3000/3 = 1000sec
=16min 40 sec
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