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23 January, 01:48

Two cars approach each other on a straight and level road. Car A is traveling at 75 km/h, due north and Car B is traveling at 45 km/h due south. Both velocities are measured relative to the ground. At a certain instant, the distance between the cars is 15 km. How long will it take, in seconds, from that instant for the two cars to meet?

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  1. 23 January, 02:51
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    it will take the cars t = 0.125 h for them to have a distance of 15 km between them.

    Explanation:

    at the instant the cars are 15 km apart they gonna have to move:

    75*t and 45*t respectively

    where t is the time it will take them to be move until they 15 km apart, then to find the time:

    75*t + 45*t = 15

    120*t = 15

    t = 0.125 h

    Therefore, it will take the cars 0.125 hours for them to end up being 15 km apart.
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