How To study Term 2 in 20 Days

A man, a woman or a boy can do a job in 20 days, 30 days or 60 days respectively. How many boys must assist 2 men and 8 women to do the work in 2 days?

A can do of a work in 10 days. B can do of the work in 20 days. In how many days can both A and B together do the work?

A and B can do piece of work in 12 days; B and C in 15days;C and A in 20 days.In how many days will they finish it together and separately ?

A is 20% more efficient than B.B can do a piece of work in 20 days. In how many days can A do the same work?

Twelve persons can do a piece of work in 20 days. How many persons are required to do the same in 24 days?

75 boys do a piece of work in 24 days. How many meri will finish double the work in 20 days when one days' work of 2 men is equal to one days' work of 3 boys?