A job can be done by 3 skilled worksmen in 20 days or by 5 boys in 30 days. How many days will they take if they work together? `8\ d a y s` b. `10\ d a y s` c. `12\ d a y s` d. `11\ d a y s`

3 men or 6 women can do a piece of work in 20 days. In how many days will 12 men and 8 women do the same work? 3 1/2d a y s b. 3 3/4d a y s c. 4\ d a y s d. 5\ d a y s

A and B can do a piece of work in 30 days, while B and C can do the same work in 24 days and C and A in 20 days. They all work together for 10 days when B and C leave. How many days more will A take to finish the work ? 18 d a y s b. 24 d a y s c. 30 d a y s d. 36 d a y s

A and B can do a piece of work in 12 days, B and C in 8 days and C and A in 6 days. How long would B take to do the same work alone? a. 24 d a y s b. 32 d a y s c. 40 d a y s d. 48 d a y s

12 men complete a work in 9 days. After they have worked for 6 days, 6 more men join them. How many days will they take to complete the remaining work? 2 d a y s b. 3 d a y s c. 4 d a y s d. 5d a y s e. none of these

A and B can finish a work, working on alternate days, in 19 days, when A works on the first However, they can finish the work, working alternate days, in 19 5/6 days, when B works on first day. How many days does A alone take finish the work? a. 11 1/2 d a y s b. 15 d a y s c. 18 d a y s d. 21 d a y s

Amit and Sumit can plough a field in 4 days. Sumit alone can plough the field in 6 days. In how many days will Amit alone plough the field? a. 10 d a y s b. 12 d a y s c. 15 d a y s d. 14 d a y s

8 men can complete a piece of work in 20 days. 8 women can complete the same work in 32 days. In how many days will 5 men and 8 women together complete the same work? 10 d a y s b. 12 d a y s c. 14 d a y s d. 16 d a y s e. none of these

A team of workers was employed by a contractor who undertook to finish 360 pieces of an article in a certain number of days. Making four more pieces per day than was planned, they could complete the job a day ahead of schedule. How many days did they take to complete the job? 8 d a y s b. 12 d a y s c. 9 d a y s d. 10 d a y s

X can do a piece of work in 40 days. He works at it for 8 days and then Y finished it in 16 days. How long will they together take to complete the work ? 13 1/3 d a y s b. 15 d a y s c. 20 d a y s d. 56 d a y s

A man and a boy together can do a certain amount of digging in 40 days. Their speeds in digging are in the ratio of 8 : 5. How many days will the boy take to complete, the work it engaged alone? 2 d a y s b. 68 d a y s c. 80 d a y s d. 104 d a y s