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.

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