A train leaves Little Rock, Arkansas, and travels north at 70 kilometers per hour. Another train leaves at the same time and travels south at 75 kilometers per hour. How long will it take before they are 435 kilometers apart?

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02-01-2017
Mathematics

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A train leaves Little Rock, Arkansas, and travels north at 70 kilometers per hour. Another train leaves at the same time and travels south at 75 kilometers per hour. How long will it take before they are 435 kilometers apart?

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EdgyEd EdgyEd · Answer 1 · 2017-01-02T16:48:50+01:00

EdgyEd EdgyEd

02-01-2017

Train A speed= 70 km/h north
Train B speed= 75 km/h south
Opposite directions= add speeds 70+75=145
Distance= 435 Km
Time= d/s; 435/145= 3 hours
It would take 3 hours for the trains to be 435 kilometers apart

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A train leaves Little​ Rock, Arkansas, and travels north at 70 kilometers per hour. Another train leaves at the same time and travels south at 75 kilometers per hour. How long will it take before they are 435 kilometers​ apart?

Respuesta :

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A train leaves Little Rock, Arkansas, and travels north at 70 kilometers per hour. Another train leaves at the same time and travels south at 75 kilometers per hour. How long will it take before they are 435 kilometers apart?