Q3 of 26 Page 103

540 Bighas of land of an agricultural farm are to cultivated in 14 days.120 Bighas of land was cultivated in first 4 days by 5 tractors of equal strength. Let’s work out using the method of the Rule of Three how many tractors will be required to complete the cultivation in time.

theorem1:-


The Rule of Three is a Mathematical Rule that allows you to solve problems based on proportions. By having three numbers: a, b, c,


(a)Direct proportions rule of 3:-


if ab


c then


(b)inverse proportions rule of 3:-


if ab


c then


formula:- (i)direct method----


(ii)indirect or inverse proportions xy=k



given:-


method used is called indirect or inverse proportions method



w1=540,w2=120,d1=14,d2=4,t1=?,t2=5




t1=6.42


More from this chapter

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1

The work for construction of the village road will be started. It has been decided that 14 people will work 4 hours daily for 15 days to complete the total work. Let’s work out using the Rule of three method how long it will take to complete the work by 24 people working 7 hours daily.

 2

In a book of 105 pages written by Subhash uncle, there are in average 25 lines in each page and there are in average 8 words in each line. Let’s work out using the method of the Rule of Three how many pages will be there in the book if there are 30 lines in each page having 10 words in each line.

 4

30 heads of people repair part of a road of a village in 15 days. Let’s work out using the method of the Rule of Three how many days it will take to repair the rest of the road if additional 10 heads of people join.

5

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