Question

120copys of a book cost rs 540 what will 400 copy's of this cost
answer options.
a rs1600
brs1500
c rs 1800
d rs2400
​

Answer 1

Answer:

c. rs 1800

Step-by-step explanation:

use of unitary method firstly divide 540 by 120 then the answer will be 4.5 then multiply 4.5 by 400 how many book do you get. the answer will be like this 540÷120=4.5×400=1800.

Answer 2

Given:

1. Cost of 120 copies of a book = Rs. 540

To find:

1. Cost of 400 copies of the book

Solution:

This question can be solved using the unitary method as follows:

1. Cost of 120 copies = Rs. 540
2. Cost of 1 copy = Rs. 540/ 120 = Rs. 4.5
3. Cost of 400 copies = Cost of 1 copy x 400
4. Cost of 400 copies = Rs. 4.5 x 400 = Rs. 1800

Thus, the cost of 400 copies of the book will be  (Option C)  Rs.1800.