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      Question

      Two cyclists travel from X to Y at speeds of 18 km/hr

      and 24 km/hr. If one of them takes 15 minutes less time than the other to reach the destination, then find the distance (in km) between X and Y.
      A 18 Correct Answer Incorrect Answer
      B 40 Correct Answer Incorrect Answer
      C 30 Correct Answer Incorrect Answer
      D 20 Correct Answer Incorrect Answer

      Solution

      Given: Speed₁ = 18 km/h Speedβ‚‚ = 24 km/h Time difference = 15 min = 1/4 hr Let distance = d km Equation: d/18 βˆ’ d/24 = 1/4 LCM of 18 and 24 = 72 (4d βˆ’ 3d)/72 = 1/4 d/72 = 1/4 d = 72 Γ— 1/4 = 18

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