Question

5pens and one book together cost Rs.225. Cost of 10 pens is equal to cost of 1 book find the total cost of 3pens and 2 books

Answer 1

Let the cost of pen is xand cost of book is y
given cost of 5 pen and one bookis 225
So
5x+y=225----1
Also cost of 10pen is equal to one book
That means
10x=y------2
put eqn 2 in eqn 1
We get
5x+10x=225
15x=225
X=225/15
=15
Then y= 10x
=10*15=150
So cost of 3 pen ans 2 bookis
3x+2y= 3(15)+2(150)
=345rs
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