A body covers a distance of 20 km in 20 mins. Calculate its speed in km/h and m/s.
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D=20km
t=20min.=20/60hrs.=0.33hrs
S=D/t
20/0.33
60km/hrs
also,
D=20km=20,000m
t=20×60×60=72000sec.
S=D/t
=20000/72000
=0.27m/s
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