Question

the cost of 51 sharpners is rs 1020 find the cost of 217 sharpener​

Answer 1

Answer:

Let the cost of each pen =Rs.x, each pencil =Rs.y and of each eraser =Rs.z

As per the given information,

2x+3y+4z=46 --- (1)

3x+y+6z=62 --- (2)

Multiplying eqn 1 with 3 we get

6x+9y+12z=138 --- (3)

Multiplying eqn 2 with 2 we get

6x+2y+12z=124 --- (4)

Subtracting eqn 4 from eqn 3, we get

7y=14

=>y=2

So, cost of each pencil =Rs2