Question

a lending library has a fixed charge for the first three days and an additional charge for each day thereafter. saritha paid rs 27 for a book kept for 7 days, while susy paid rs 21 for for the book she kept for 5 days. find the fixed charge and the charge for each extra day

Answer 1

Answer:

let, fixed charged=x

additional charges=y

then according to question ,

x+4y=27-(1)

x+2y=21-(2)

subtracting equation (1) and (2), we get,

x+4y=27

- x-2y=-21

2y=6

therefore,y = 3

putting value of y in equation (1),

x+(4)(3)=27

x=12

therefore, fixed charges =12 and additional charges for each day =3