Q3 of 26 Page 100

It took 15 days for 30 heads of labourers to dig a pond at Bakultala village. Let’s work out using the the Rule of Three method in how many days 25 heads of labourers could have completer the said work.

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


(iiii)d1t1=d2t2


given:-



method used is called indirect method


d1t1=d2t2


3015=25t2


18=t2


Therefore 25 labourers will work for 18 day


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