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      Question

      While driving from city ‘P’ to city ‘Q’, Asha

      had to slow down due to heavy rain and took 25% more time than usual. Find the percentage decrease in her speed.
      A 25% Correct Answer Incorrect Answer
      B 20% Correct Answer Incorrect Answer
      C 12% Correct Answer Incorrect Answer
      D 18% Correct Answer Incorrect Answer

      Solution

      ATQ, Since 25% = 1/4 Therefore, ratio of time taken before and after the delay = 4:5 Ratio of speeds (reversing as distance is constant) = 5:4 Required percentage decrease = {(5 – 4)/5} × 100 = 20%

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