Q. 8 A4.0( 3 Votes )

# <span lang="EN-US

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 a b

c then (b)inverse proportions rule of 3:-

if a b

c then formula:- (i)direct method---- (ii)indirect or inverse proportions xy=k

given:- method used is called direct method

for 1 pen is 112.5/25= 4.5cost

so,12 pen cost is 4.5x12=54

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation view all courses RELATED QUESTIONS :

<span lang="EN-USWest Bengal - Mathematics

A company has gotWest Bengal - Mathematics

<span lang="EN-USWest Bengal - Mathematics

Let’s make mathemWest Bengal - Mathematics

A ship takes 25 dWest Bengal - Mathematics

A pump of 5 HP caWest Bengal - Mathematics

<span lang="EN-USWest Bengal - Mathematics

<span lang="EN-USWest Bengal - Mathematics

There was a stockWest Bengal - Mathematics

There are two motWest Bengal - Mathematics