15 men take 21 days of 8 hrs. each to do a piece of work. How many days of 6 hrs. each would it take for 21 women if 3 women do as much work as 2 men?

If 10 men or 20 boys can make 260 mats in 20 days, then how many mats will be made by 8 men and 4 boys in 20 days?

• [A] 260
• [B] 240
• [C] 280
• [D] 520

5 men or 8 women do equal amount of work in a day. A job requires 3 men and 5 women to finish the job in 10 days how many woman are required to finish the job in 14 days?

• [A] 10
• [B] 7
• [C] 6
• [D] 12
• [E] none of these

A and B completed a work together in 5 days. had A worked at twice the speed and B at half the speed, it would have taken them four days to complete the job. How much time would it take for A alone to do the work?

• [A] 10 days
• [B] 20 days
• [C] 25 days
• [D] 15 days
• [E] 24 days

A is 20 percent more efficient than B. If the two persons can complete a piece of work in 60 days. In how many days A working alone can complete the work?

• [A] 132 days
• [B] 100 days
• [C] 120 days
• [D] 110 days
• [E] 90 days

A can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in:

• [A] 15 days
• [B] 20 days
• [C] 25 days
• [D] 30 days