A works twice as fast as B. If B can complete a work in 12 days independently, the number of days in which A and B can together finish the work is `4\ d a y s` b. `\ 6\ d a y s` c. `8\ d a y s` d. `18\ d a y s`

A Works twice as fast as B. If B can complete a work in 24 days independently, the number of in which A and B can together finish the work is

A works 3 times as fast as B. If B can complete a work in 60 days, then in how many days can A and B together complete the same work ?

Some persons can do a piece of work in 12 days. Two times the number of such persons will do half of that work in 6\ d a y s b. 4\ d a y s c. 3\ d a y s d. 12\ d a y s

A and B can do a work in 8 days, B and C can do the same work in 12 days. A, B and C together can finish it in 6 days. A and C together will do it in 4 d a y s b. 6 d a y s c. 8 d a y s d. 12 d a y s

A is twice as fast as B and together they can complete a work in 20 days. In how many days can A alone complete the work?

A is twice as fast as B and together they can complete a work in 20 days. In how many days can A alone complete the work?

A and B together can complete a work in 12 days. A alone can complete it in 20 days. If B does the work only for half a day daily, then in how many days A and B together will complete the work? 110 d a y s b. 11 d a y s c. 15 d a y s d. 20 d a y s

The work done by a woman in 8 hours is equal to the work done by a man in 6 hours and by a boy in 12 hours. If working 6 hours per day 9 men can complete a work in 6 days, then in how many days can 12 men, 12 women and 12 boys together finish the same work, working 8 hours per day? 1 1/2d a y s b. 3\ d a y s c. 3 2/3d a y s d. 4 1/2d a y s