Question

the cost of eraser is 25 paise more than the cost of a eraser. If the cost of 8 pencils and 10 erasers is Rupees 12.80, find the cost of each ?

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Answer 1

Answer:

Let cost one pen, one pencil, one eraser be x,y,z rupees respectively.

Therefore 4x+2y+8z = 12

8x+10y+4z = 36

Adding above equations

12x+12y+12z = 48

Divide above equation by 4 then

3x+3y+3z = 12

Cost of 3 pens ,3 pencils,3 erasers is Rs.12 .