Question

The cost of 5 pens and erasers is rs 380. what is the cost of 15pens and 27 ersers

Answer 1

Answer:

Hey mate. I think there is something missing in this question. The quantity of erasers has been written by you. As I have already solved this question in my lower classes, I think the question must be "the cost of 5 pens and 9 erasers is rs 380. what is the cost of 15 pen and 27 eraser?" If this is the question then, this is how you can solve it.

Step-by-step explanation:

let cost of 1 pen is x and cost of 1 eraser is y, then a/c to question

5x + 9y = 380 ........................................... (1)

now multiply equation (1) with 3

15x + 27y=1140 .........................................(2)

Hence, from (2) cost of 15 pen and 27 erasers is RS 1140/-

Hope this helps you. Thank you and please follow me and mark me the brainliest.

Answer 2

The question has some mistakes. Correct question is

The cost of 5 pens and 9 erasers is Rs 380. What is the cost of 15pens and 27 erasers?

1140

Given:

The cost of 5 pens and 9 erasers is Rs 380.

cost of 15 pens and 27 erasers is?

Let us consider pencil as x and eraser as y

Thus, 5x+9y=380

In the second statement,

15 pens, which is three times the 5x so that it is 15x

27 erasers, which is three times the 9x so that it is 27x

Therefore, the value will be 380*3

The value of 380*3=1140

Hence, the cost of 15 pens and 27 erasers is 1140.