Arunbabu used 16 ploughs to cultivate his whole land in 10 days. Find, if the wanted to cultivate the same land in 8 days, how many ploughs he would have needed.

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.

2 men can cultivate 6 acres of land in 4 days . By using theory of variation , find the number of men required to cultivate 18 acres of land in 8 days.

To construct an embankment on a certain part of river Ichhamati, 40 labours are required to work for 35 days, If the work has to be finished in 28 days, let us find how many labours will be needed?

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.

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.

22 men are required to paint a house in 10 days. In how many days will 11 men paint the same house. Find?

If 5 men can cultivate 10 acres of land in 9 days,then by usnig theory of variation, find the number of days required to cultivate 30 acres of land by 25 men .

Ourselves - (2) Rafikul uncle built a house on 3/5 of 4/7 part of his land, and rest is left for rest of the land the cultivation. Let us find on what part of land he built his house.

8 men can do a piece of work in 15 days. Find in how many days will 10 men finish the same work.

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 .