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March 27, 2017

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A car travels 20 km/h faster than a truck. The car covers 360 km in 3 hours less time than the truck.Find the speed of the truck.
(kindly write the solution, thanks alot)

  • distance problem - ,

    vc = vt + 20
    tc = tt - 3

    360 = vc tc = (vt+20)(tt-3)
    360 = vt tt so tt = 360/vt

    360 = (vt+20)(360/vt - 3)

    360 vt = (vt+20)(-3 vt +360)
    360 vt = -3 vt^2 -60 vt + 360 vt + 7200

    3 vt^2 + 60 vt -7200 = 0
    vt^2 + 20 vt - 2400 = 0
    (vt+60)(vt-40) = 0
    vt = 40

  • distance problem - ,

    sir what do you mean by vt and tt, vc and tc... tnx....

  • distance problem - ,

    yeah

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