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Convert these speeds in SI units.

Question:

The average speed of a snail is $0.020$ miles/hour and that of a leopard is $70 m i l e s /$ hour. Convert these speeds in SI units.

Solution:

1 mile $=1.6 \mathrm{~km}=1600 \mathrm{~m}$, and 1 hour $=3600$ seconds.

Speed of snail $=0.02 \times 1600 / 3600$ metre per sec $=0.0089 \mathrm{~m} / \mathrm{sec}$.

Speed of leopard $=70 \times 1600 / 3600$ metre per sec $=31 \mathrm{~m} / \mathrm{sec}$.

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