36
The cost of 2 pencil, 4 pens and 8 erasers is Rs. 12 and the cost of 8 pens, 10 pencils and 4 erasers is Rs. 36. How much will 3 pencils, 3 pens and 3 erasers cost?
- ARS. 10
- BRS. 15
- CRS. 12
- DRs. 18
Answer not set
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0
CCommunity
Let the cost of 1 pencil, 1 pen and 1 eraser be x, y and z respectively.
2x + 4y + 8z = 12 ----(1)
10x + 8y + 4z = 36 ----(2)
Adding (1) and (2), 12x + 12y + 12z = 48
⇒ 3x + 3y + 3z = 48/4 = 12
∴ Cost of 3 pencils, 3 pens and 3 erasers is Rs. 12
2x + 4y + 8z = 12 ----(1)
10x + 8y + 4z = 36 ----(2)
Adding (1) and (2), 12x + 12y + 12z = 48
⇒ 3x + 3y + 3z = 48/4 = 12
∴ Cost of 3 pencils, 3 pens and 3 erasers is Rs. 12
0
CCommunity
Let the cost of 1 pencil, 1 pen and 1 eraser be x, y and z respectively.
2x + 4y + 8z = 12 ----(1)
10x + 8y + 4z = 36 ----(2)
Adding (1) and (2), 12x + 12y + 12z = 48
⇒ 3x + 3y + 3z = 48/4 = 12
∴ Cost of 3 pencils, 3 pens and 3 erasers is Rs. 12
2x + 4y + 8z = 12 ----(1)
10x + 8y + 4z = 36 ----(2)
Adding (1) and (2), 12x + 12y + 12z = 48
⇒ 3x + 3y + 3z = 48/4 = 12
∴ Cost of 3 pencils, 3 pens and 3 erasers is Rs. 12