Question

five pens and one book together cost rupees 225 cost of 10 pens is equal to the cost of one book find the total cost of 3 pens and 2 books

solve it step by step ​

Answer 1

cost of (5 pen+1book)=225

cost of 10 pen = cost of 1 book

cost of 15 pen=225

cost of 1pen=15

cost of 3 pen=45

cost of 2 book=300

Answer 2

let pen be x and book be your

then,

5x+y=225 .........(i)

10x=y

we can put value of y in eq(i)

5x+10x=225

15x=225

x=15

and y=10×15

y=150

total cost=3×15+2×150

=345

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