A lending library has a fixed charge for the first three days and an additional charge for each day thereafter.Mona paid Rs.27 for a book kept for 7 days,while Tanvy paid Rs.21 for the book she kept for 5 days.Find the fixed charge and the charge for each extra day.

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Solution

Let the fix charge be x and the aditional charge of per day be y
according to question
mona's case
x+4y=27 ...........(1)

tanvy's case
x+2y=21..........(2)
Solving both equations

2y=27-21
2y=6
y=3 additional charge
putting value in eq 2
x=15 fixed charge for 3 days

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Q. A lending library has a fixed charge for the first three days and an additional charge for each day thereafter.
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A lending library has a fixed charge for the first three days and an additional charge for each day thereafter. Saritha paid ₹ 27 for a book kept for seven days, while Susy paid ₹ 21 for the book she kept for five days. Find the fixed charge and the charge for each extra day.

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A lending library has a fixed charge for the first three days and an additional charge for each day thereafter.Mona paid Rs.27 for a book kept for 7 days,while Tanvy paid Rs.21 for the book she kept for 5 days.Find the fixed charge and the charge for each extra day.

Let the fix charge be x and the aditional charge of per day be y according to question mona's case x+4y=27 ...........(1) tanvy's case x+2y=21..........(2) Solving both equations 2y=27-21 2y=6 y=3 additional charge putting value in eq 2 x=15 fixed charge for 3 days

Let the fix charge be x and the aditional charge of per day be y
according to question
mona's case
x+4y=27 ...........(1)

tanvy's case
x+2y=21..........(2)
Solving both equations

2y=27-21
2y=6
y=3 additional charge
putting value in eq 2
x=15 fixed charge for 3 days