The cost of 6 pens is equal to the cost of the 10 pencils. If the cost of 4 pencils is Rs. 120,
then what is the cost of 4 pens?
...
please explain
Answers
Answered by
3
Answer:
The cost of four pens is 200
Answered by
6
Answer:
200
Explanation:
6pens =10pencils
pen=x ,pencil=y
6x=10y 3x=5y, y=3/5x
3x=4y+y, 4y=120
3x=120+y
3x=120+3/5x
3x-3/5x=120
15x-3x/5=120
X=50, 4x=200
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