The Pencil Eraser Cost Problem is given below
Romila went to a stationary stall and purchased 2 pencils and 2 erasers for Rs 8.
Her friend Sonali saw new variety of pencils and erasers with Romila, and she also bought 4 pencils and 6 erasers for Rs 18.
Find the cost of a pencil and an eraser?
Let the cost of a pencil be Rs x and the cost of an eraser be Rs y.
It is given that Romila purchased 2 pencils and 2 erasers for Rs 8.
=> x+y=4 ……………. (1)
=> x=4-y …………….. (2)
It is also given that Sonali purchased 4 pencils and 6 erasers for Rs 18.
That is, 4x+6y=18
=> 2x+3y=9 …………. (3)
putting the value of equation (2) into equation (3), we get
put the value of y in equation (2),
The cost of a pencil is Rs 3 and the cost of an eraser is Rs 1.
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