Multiple choice

A piece of work is to be done in a school which 16 men or 20 women can finish in 25 days. How many days will 28 men and 15 women take to finish this job?

  1. 5 days

  2. 4 days

  3. 9 days

  4. 10 days

  5. 13 days
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

16 men = 20 women, so 1 man = 1.25 women. 28 men + 15 women = 28(1.25) + 15 = 35 + 15 = 50 women. 20 women take 25 days, so 50 women take (20 * 25) / 50 = 10 days.

AI explanation

Using the unit conversion method, 16 men equal 20 women, so 1 man equals 1.25 women. The team of 28 men and 15 women is equivalent to 15 plus (28 multiplied by 1.25), which equals 50 women. Since 20 women can finish the job in 25 days, the total work is 500 woman-days. Therefore, 50 women will complete the 500 woman-days of work in 10 days.

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