Ravi bought 5 pencil and 10 eraser for Rs 4 . Sheetal bought 3 pencil and 9 eraser for Rs 3 then what would be the cost of pencil and eraser.
Answers: A) .15p, .30p B) .50p,.27p C) .40p,.20p D) .20p,.40p E) .50p,.40p
Let pencil be x and eraser be y so   5x+10y=4   3x+9y=3   By solving the above two equations we get x=.40p and y=.20p correct ans is .40p,.20p
<result>C</result>
Ravi bought 5 pencil and 10 eraser for Rs 4 . Sheetal bought 3 pencil and 9 eraser for Rs 3 then what would be the cost of pencil and eraser.