Multiple choice

39 persons can repair a road in 12 days, working 5 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work?

  1. 10

  2. 13

  3. 14

  4. 15
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Using M1*D1*H1 = M2*D2*H2: 39 * 12 * 5 = 30 * D2 * 6. 2340 = 180 * D2. D2 = 2340 / 180 = 13.

AI explanation

Using the formula M1 x D1 x H1 = M2 x D2 x H2 for the constant total work, substitute the given values as 39 x 12 x 5 = 30 x D2 x 6. This simplifies to 2340 = 180 x D2. Solving for D2 gives D2 = 2340 / 180, which equals 13.

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