36 men can do a piece of work in 12 days. In how many days 9 men can do the same work?

24 men working at 8 hours per day can do a piece of work in 15 days. In how many days can 20 men working at 9 hours per day can complete the same work?

A and B together can finish a piece of work in 12 days. If 'A' alone can finish the same work in 20 days, how many days B alone can finish it ?

Formulate the following problems as a pair of equations and then find their solutions. 4 men and 6 women can finish a piece of work in 21 days while 10 men and 3 women can finish it in 14 days. Find the time taken by one man along and that by one woman along to finish the work.

48 men can dig a trench in 14 days then how many days will be taken by 28 men to dig the same clich?

10 men can lay a road 75 km long in 5 days.. In how many, days can 15 men lay a road 45 km long?

If 36 workers can build a wall in 12 days, how many days will 16 workers take to build the same wall ? (assuming the number of working hours per day is constant)

How do muscles work?

Rehana works 2 1/2 hours each day on her embroidery. She completes the work in 7 days. How many hours did she take to complete her work?

Do you know how many days a hen, spends to hatch its egg?

Do you know how many days a hen, spends to hatch its egg?