5 pens and 1 books together cost 225 cost of 10 pens is equal to the cost of one book find the total cost of 3 pens and 2 books
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1book cost is and 5 pen is 225.
cost of 10 pen is equal to cost of 1 book
therefore cost of 5pen 50% of book
the cost of 5pen is 75
then the cost of the 1book is 150
than the cost of 1 one pen is 75/5
=15
than cost of 3 pen and 2 book
3×15 +150×2
45 + 300
345
cost of 10 pen is equal to cost of 1 book
therefore cost of 5pen 50% of book
the cost of 5pen is 75
then the cost of the 1book is 150
than the cost of 1 one pen is 75/5
=15
than cost of 3 pen and 2 book
3×15 +150×2
45 + 300
345
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