If an object travels at 0.2 cm per second, how many meters does it travel in 4 hours?



Convert the object's speed from cm per second to m per hour:
\(\frac{0.2 \frac{\mathrm{m}}{\mathrm{s}} \times 60 \frac{\mathrm{s}}{\mathrm{min}} \times 60 \frac{\mathrm{min}}{\mathrm{hr}}}{100 \frac{\mathrm{m}}{\mathrm{m}}}=\frac{720 \frac{\mathrm{m}}{\mathrm{hr}}}{100 \frac{\mathrm{m}}{\mathrm{m}}}=7.20 \frac{\mathrm{m}}{\mathrm{hr}}\)
Then multiply by the number of hours:

\({ 7.20\frac{m}{{hr}} \times 4hr = 28.80m }\)

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