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Digiron [165]
3 years ago
14

A cyclist rides her bike at a rate of 12 meters per second. What is this rate in kilometers per hour? How many kilometers will t

he cyclist travel in 3 hours? Do not round your answers.
Mathematics
1 answer:
IgorLugansk [536]3 years ago
3 0

Answer:

Part 1) The rate is 43.2\frac{km}{h}

Part 2) 129.6\ km

Step-by-step explanation:

Part 1)

we know that

A cyclist rides her bike at a rate of 12 meters per second

Remember that

1 hour=3,600 seconds

1 kilometer=1,000 meters

therefore

12\frac{m}{sec} =\frac{(12/1,000)}{(1/3,600)}=\frac{12*3,600}{1,000}=43.2\frac{km}{h}

Part 2) How many kilometers will the cyclist travel in 3 hours?

using proportion

\frac{43.2}{1}\frac{km}{h}=\frac{x}{3}\frac{km}{h}\\ \\x=43.2*3\\ \\x=129.6\ km

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