Q. 23.7( 3 Votes )

# 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.

Answer :

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

book content =no. of page x no. of line x no .of word

=105x25x8=21000

again

book content =no. of page x no. of line x no .of word

21000=no. of page x30x10

no.of page =70.

Rate this question :

It takes 27 days to make 1000 spare parts by 16 numbers of machines. Let’s work out using the Rule of Three method how many days will it take to make the same number of spare parts if additional two machines are installed.

West Bengal - Mathematics30 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.

West Bengal - Mathematics