Q. 94.4( 17 Votes )

The average speed of a snail is 0.020 miles/hour and that of a

leopard is 70 miles/hour. Convert these speeds in SI units.

Answer :

The SI unit for distance is meter (m) and that for time is seconds (s), so the SI unit of speed will be ms-1.


1 mile = 1.6 km = 1600 m


1 hour = 60 mins = 60 × 60 seconds = 3600 seconds (1 min has 60 seconds)


For the snail –


Speed = 0.02 miles / hour


Converting into SI units



=0.0089 ms-1


For the cheetah –


Speed = 70 miles/hour


Converting into SI units



=31.12 ms-1


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