Question

three rulers and one pencil cost as same as two eraser.one ruler, two pencil and 3 erasers cost Rs 25. if the price of each item in a whole number, then find the price of a eraser​

Answer 1

Answer:

don't know

Step-by-step explanation:

sorry I don't know the answer

Answer 2

5 Rs. will be the price for one eraser.

Step-by-step explanation:

Let the price of one ruler is Rs. R, one pencil is Rs. P and one eraser is Rs. E.

So, by the given conditions we can write the two equations :

3R + P = 2E ........ (1) and

R + 2P + 3E = 25 ........ (2)

Now, putting the value of P from the equation (1) to the equation (2) we get,

R + 2(2E - 3R) + 3E = 25

⇒ 7E - 5R = 25 ........... (3)

As the value of R, P and E are whole numbers, therefore, R = 2 and E = 5 or R = 9 and E = 10 and so on.

But putting R = 9 and E = 10 in equation (1) we get negative value of P.

Therefore, E = 5 Rs. will be the price for one eraser. (Answer)