Question

The cost of notebook is twice the cost of pen which is five times the cost of the pencil which is 2 1/2times of eraser.
The relationship between :-
1) The cost of notebook and eraser.
2) The cost of pen and eraser.​

Answer 1

Answer:

Assumption

Step-by-step explanation:

Hope you get what I mean

*Remember, Always assume the cost of Cheapest Article & proceed as directed.

:)

Answer 2

Answer:

1)notebook =  105 times eraser

2) pen = 105/2 times eraser

Step-by-step explanation:

let cost of notebook be x , of pen be y , of pencil be z and eraser be a

according to question x = 2y.............(i)

y =5z.......(ii)

z = 21/2 *a..........(iii)

by ii and iii ,

y = 105/2 * a ( ans of 2nd part)........(iv)

by iv and i

x = 105 a ( ans of 1st part)