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

    Question

    Two vehicles which are 100 km apart are running towards

    each other in a straight line. In how much time will they meet each other provided they follow a uniform speed of 45 km per hour and 80 km per hour respectively?
    A 60 minutes Correct Answer Incorrect Answer
    B 55 minutes Correct Answer Incorrect Answer
    C 48 minutes Correct Answer Incorrect Answer
    D 45 minutes Correct Answer Incorrect Answer

    Solution

    Relative speed if both vehicles running opposite directions = 45 + 80 = 125 km/hr Let both vehicles meet each other after x hrs. 125 = 100/x ⇒ x = 100/125 ⇒ x = 4/5 hrs ⇒ x = 4/5 × 60 ⇒ x = 48 min ∴ Both vehicles meet each other after 48 min.

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