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

    Question

    A cyclist maintained an average speed of 22 km/hr for the

    first 18 hours of a race. In the next 6 hours, his average speed was ‘x’ km/hr, so that his overall average speed became 25 km/hr. Find the value of 'x'.
    A 93 Correct Answer Incorrect Answer
    B 34 Correct Answer Incorrect Answer
    C 69 Correct Answer Incorrect Answer
    D 77 Correct Answer Incorrect Answer

    Solution

    ATQ,

    {22 × 18 + 6 × x}/(18 + 6) = 25

    Or, 6x + 396 = 25 × 24 = 600

    Or, 6x = 204

    Or, x = 34

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