Question

A lending library has a fixed charge for the first three days and an additional charge for each dav
thereafter. Sarita paid 27 for a book kept for seven days, while Sunil paid 21, for the book he
kept for five days. Find the fixed charge and the charge for each extra day.​

Answer 1

Step-by-step explanation:

Let the fixed charge be x and additional charge on each day be y

according to the question,

x+7y=27---(i) *5

x+5y=21----(ii) *7

5x+35y=135 ---(iii)

7x+35y=147----(iv)

subtract eq iii from iv

we get x=6

putting value of x in eq (i)

we get

y=3

so fixed charge for 3 days is 6 rs

and charge for additional day is 3 rs