Question : 14 people can do work in 28 days. In how many days, can 8 people complete double the work?
Option 1: 55 days
Option 2: 98 days
Option 3: 80 days
Option 4: 32 days
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Correct Answer: 98 days
Solution : Let the total work = 14 × 28 = 392 units Time taken by 8 people to do the double work = $\frac{2×392}{8}$ = 2 × 49 = 98 days Hence, the correct answer is 98 days.
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Question : Rahul can complete his work in 7 days and Raj can complete the work in 4 days. How many total days will they take to complete the work together?
Option 1: $\frac{14}{11}$ days
Option 2: $\frac{15}{11}$ days
Option 3: $\frac{28}{13}$ days
Option 4: $\frac{28}{11}$ days
Question : If A can do a work in 21 days and B can do the same work in 28 days. In how many days will they complete the work if they work on alternate days?
Option 1: 22 days
Option 2: 28 days
Option 3: 20 days
Option 4: 24 days
Question : 5 men can complete a work in 12 days, and 6 women can complete the same work in 20 days. In how many days can 1 man and 1 woman together complete this work?
Option 1: 120 days
Option 2: 32 days
Option 3: 40 days
Option 4: 60 days
Question : 8 women can complete a work in 15 days. If 2 women are employed, then in how many days the work will be completed?
Option 1: 44 days
Option 2: 64 days
Question : S alone can do a piece of work in 14 days. T alone can do the same work in 21 days. U alone can do the same work in 28 days. Working together, in how many days will they complete the work?
Option 1: $\frac{84}{13}$ days
Option 2: $\frac{77}{13}$ days
Option 3: $\frac{71}{13}$ days
Option 4: $\frac{87}{13}$ days
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