Question

Koto’s average velocity was 4. 5 m/s. She started at her house and traveled 15000 meters north, 5000 meters east, 20000 meters south, and then 5000 meters west. What was the time of her trip? (There are 60 seconds in 1 minute. ) 18. 5 minutes 20. 4 minutes 2 hours 3 hours.

Answer 1

The correct statement is that the average time taken by Koto for completion of such trip is 3 hours. So the correct option that matches the quoted statement above is D.

The calculation of such trip of Koto can be done by applying the known formula of Time when the Speed is multiplied by Distance to compute the actual time of the trip.

Calculation of Time taken for travel

• We know the formula that

• $\rm Speed= \dfrac{Distance\ Travelled }{Time\ taken}\\\\Time= Speed\ x\ Distance$

• Using the formula above, the commute in each direction is added as 45000 meters or 45 kilometers.

• If Koto's average speed is 4.5 meters per second, then she travels roughly 270 meters in one minute. Using this information, putting the values in the formula, we get,

• $\rm Time= \dfrac{45000\ }{270}meters\\\\\rm Time= 166.7$

• Converting minutes into hours, we get

• $\rm Hours= \dfrac{Minutes}{60}\\\\\rm Hours= \dfrac{166.7}{60}\\\\\rm Hours=2.77\ hours$

• Time will be rounded off to the nearest value, and we can conclude that the trip takes about three hours to complete.

Hence, the correct option is D that the time taken by Koto to complete such trip is roughly three hours.

Learn about Time and Distance here:

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