A Japanese bullet train can travel at 300km /h how long will it take to cover a section of track 180 km in length

SAT

1 answer:

sweet [91]2 years ago

3 0

Answer:

36 minutes

Explanation:

If we assume that 180 is a fraction of 300, we can simplify it down to 18/30 and then further simplify it to 3/5 (by dividing both by the GCF, 6). It will take 3/5 of an hour for the train to travel 180 km (or 3/5 of the distance it can travel in one hour). 1/5 of an hour is equal to 12 minutes. Therefore 3/5 of an hour is 36 minutes.

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vodomira [7]

Answer:

50 minutes

Explanation:

We can set this up as a rate * time = distance problem. We can set the rate at which Amanda travels to work to be x, since that quantity is unknown. The time it takes is given to be 60 minutes. This means that the total distance she travels to get to work is 60x. On the other hand, the way back home has more unknown quantities. The exact rate is unknown, but we do know that it is 20% more than the rate at which Amanda travels to work. This means that the rate is x + .20x, or 1.2x. We can set the time to be y, which means the total distance she travels to get back home is 1.2xy. We are told that Amanda uses the same route to get to and from work, which means 60x = 1.2xy. All we have to do now is solve this equation:

$60x=1.2xy\\60=1.2y\\y=50$