Question

the cost of 1 pencil 3 erasers is 10rs and the cost of r pencil and 6 erasers is 28 rs. find the cost of 5 pencil and 4 erasers

Answer 1

what are r pencils???

Answer 2

pencil is rs 4 eraser is rs 2 so cost of pencil 5 pencil is 5*4=20 eraser 2*4=8
20+8=28