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Tasya [4]
3 years ago
11

Two trains on opposite tracks leave the same station at the same time. One train travels at an average speed of 80 kilometres pe

r hour and the other travels at an average speed of 70 kilometres per hour. How long after they leave the station will they be 50 km apart?
Mathematics
1 answer:
GREYUIT [131]3 years ago
7 0

9514 1404 393

Answer:

  20 minutes

Step-by-step explanation:

The trains are separating at the rate of 80 +70 = 150 km/hour. The time required to be 50 km apart is then ...

  time = distance/speed = (50 km)/(150 km/h) = 1/3 h = 20 minutes

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Answer:

93

Step-by-step explanation:

Key :

A1 = Algebra 1

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Alright so basically lets first look at the info they gave us :

We have 5 more than twice as many students taking A1 than we do A2.

We have 44 students taking A2.

And we need to find the least amount of students that could be taking A1.

So we need to take the amount of students taking A2 (44) and double it to find the amount taking A1.

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But the problem also states there is 5 more then twice the number of students taking A2.

So we have that 88 but now we just need to add 5 to make up for them telling us that in the problem.

So :

88 + 5 = 93

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