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If niti drives her car at 5okm/hr from her home,she reaches the office late by 10min. However if she drives at 60km/hr,she reaches the office 5min early.find the distance of the office from her home.

  • Math -

    5 + 10 = 15 min = 0.25 hours.

    d1 = d2.
    50t = 60(t-.25)
    50t = 60t - 15
    50t - 60t = -15
    -10t = -15
    t = 1.5 h.

    D = r*t = 50 * 1.5 = 75 Miles.

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