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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