A ship takes 25 days to sail from Kolkata to Cochin. The ship started with 36 sailors for each of which 850 gm of food was allotted. But the ship rescued 15 sailors from anothersinking-ship after 13 days of journey and the ship reached Cochin in 10 days increasing the speed. Let’s work out using the method of the Rule of Three what will be the quantity of food to be consumed by of each sailor to each Cochin safely and the entire storage of food would be consumed by this time.

A power-loom is times more powerful than a hand-loom. 12 hand-looms weave 1080 meters length of cloth in 18 days. Let’s work out by the Rule of Three how many power-looms will be required to weave 2700 meters length of cloth in 15 days.

2400 Bighas of land of Cooperative Society can be cultivated by 25 farmers in 36 days. It was seen that half of the land of the Society could cultivate in 30 days after purchasing a tractor. Let’s work out the power of a tractor equivalent to the number of farmers using the method of Rule of Three.

36 heads of people of a certain village can construct 12- metres of raod working 6 hours daily in 12 days. Another 6 heads of people are involved in this work and the duration of work of each day is increased by 2 hours. Let’s work out using the method of the Rule of Three the length of road to be constructed in 9 days.

250 heads of people can dig a pond of size 50 meters long, 35 metres wide and 5.2 deep in 18 days by working 10 hours daily.Let’s work out using the method of the Rule of Three how many days it will take for 300 people to dig a pond of size 65 metres long, 40 metres wide and 5.6 metres deep by working 8 hours daily.