Question

Example 6: In each row of a hand written book
of 180 pages, there are 12 words on an average
and each page consists of 16 rows on an average.
After printing, in each row of the book there are
18 words on average and each page contains
20 rows on average. Find the number of pages
of the printed book.​

Answer 1

Step-by-step explanation:

iLet ABCD, the square garden of side= 30 m.

PQRS is the region inside the garden.

so,

PQ = (30 -1-1 ) = 28 m

also

PS = ( 30 – 1 – 1 ) = 28 m

(i) Area of the path = Area of ABCD – Area of PQRS

= [( 30 x 30) – (28 x 28)]

= 900 – 784

= 116 sq.m

(ii) Area of the remaining portion in which the grass is planted = Area of square PQRS

= 28 x 28

= 784 sq.m

cost of planting the grass in the region PQRS = area x cost = 764 x 40

=31,360

Answer 2

Have a great day ahead mate ❤️