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    Question

    B is thrice as efficient as A and C is 0.75 times as

    efficient as A. What is the ratio of number of days taken by A, B and C when they work individually?
    A 4:113 Correct Answer Incorrect Answer
    B 3:1:4 Correct Answer Incorrect Answer
    C 2:3:1 Correct Answer Incorrect Answer
    D 5:1:2 Correct Answer Incorrect Answer

    Solution

    Let the efficiency of A be 100.  Given that B is thrice as efficient as A  ⇒ Efficiency of B = 300  Also given that C is 0.75 times as efficient as A  ⇒ Efficiency of C = 75  From the given data, We need to find the ratio of several days A, B, and C when they work individually LCM of 100, 300, and 75 is 300 Ratio of several days when they work individually.  ⇒ 300/100: 300/300: 300 /75 =3:1:4

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