Rita had enough money to buy 15 book for rs30 each.if the price of each book increase resuting in a total cost increase of RS 45 how many book can she buy now? how much money will be left with her?
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rs 30* 15 books equals 450rs.
so she had a total of 450rs.
Total increase of rs 45 results in a total of 495rs.
Now the cost of each book is 495/15
that is 33rs.
but she has only 450 rs with her.
450/33 = 13.6
therefore she could buy only 13 books which costed her 429rs.
Now since she had 450rs, her remaining balance is 450-429 = 21rs
so she had a total of 450rs.
Total increase of rs 45 results in a total of 495rs.
Now the cost of each book is 495/15
that is 33rs.
but she has only 450 rs with her.
450/33 = 13.6
therefore she could buy only 13 books which costed her 429rs.
Now since she had 450rs, her remaining balance is 450-429 = 21rs
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