25 farmers take 12 days to plough 15 bighas of land. Then let's find, how many bighas of land can be ploughed by 30 farmers in 16 days.

If 15 farmers can cultivate 18 bighas of land in 5 days, determine by using theory of variation the number of days required by 10 farmers to cultivate 12 bighas of land .

4 tractors are required to cultivate 360 bighas of land in 20 days, Let us find, how many tractors are needed to cultivate 1800 bighas of land in 10 days.

If 15 farmers can cultivate 18 bighas of land in 5 days, then calculate by using thoery of variation the number of days required by 10 farmers to cultivate 12 bigas of land.

15 men can cultivate 18 bighas of land in 5 days. By using theory of variation, determine the number of bighas to be cultivated by 10 men in 10 days.

I learnt to bind book in my school. I found that it takes 1 hr. 15 min to bind I book. Let me find how many hours and mins I would take to bind 7 books.

An agricultural co-operative society of village Pachla has purchased a tractor. Previously 2400 bighas of land were cultivated by 25 ploughs in 36 days. Now half of th land can be cultivated only by that tractor in 30 days. Calculate by using the theory of variation the number of ploughs work equally with one tractor.

X men can plough Y acres of land in Z days. Then the correct relation is____

In a ship, there were stored food for 50 sailors for 16 days. After 10 days 10 more saliors joined them. Let's find, for how many days the remaining food would last.

Working 5 hours a day, a work can be completed in 30 days. Let's find, how long it would take to complete the work, working 6 hours a day.

If 5 men can cultivate om 10 bighas of land in 9 days, calculate by theory of variation how long will be taken by 25 men for cultivating 30 bighas of land.