New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    A car moving at a speed of 60 km/hr increases its speed by

    10 km/hr after ‘x’ hours. Then, it travels for (x + 5) hours at the new speed. If the car covers 455 km in these (x + 5) hours, find the distance it travelled in the first ‘x’ hours.
    A 90 km Correct Answer Incorrect Answer
    B 36 km Correct Answer Incorrect Answer
    C 28 km Correct Answer Incorrect Answer
    D 75 km Correct Answer Incorrect Answer

    Solution

    ATQ,

    70 × (x + 5) = 455

    Or, x + 5 = 6.5

    Or, x = 1.5

    Therefore, required distance travelled = 60 × 1.5 = 90 km

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