Question

v) 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.​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

✒ ᴀɴsᴡᴇʀ:-

★ ғɪxᴇᴅ ᴄʜᴀʀɢᴇ = ʀs. 15

★ ᴄʜᴀʀɢᴇ ғᴏʀ ᴇᴀᴄʜ ᴇxᴛʀᴀ ᴅᴀʏ= ʀs 3

✒ sᴛᴇᴘ-ʙʏ-sᴛᴇᴘ ᴇxᴘʟᴀɴᴀᴛɪᴏɴ:-

★ ʟᴇᴛ ᴛʜᴇ ғɪxᴇᴅ ᴄʜᴀʀɢᴇ ʙᴇ ʀs. x ᴀɴᴅ

★ ᴛʜᴇ ᴇxᴛʀᴀ ᴄʜᴀʀɢᴇ ᴛᴀᴋᴇɴ ʙᴇ ʀs. ʏ

ɴᴏᴡ, ᴀs ᴘᴇʀ ᴛʜᴇ ɢɪᴠᴇɴ ᴄᴏɴᴅɪᴛɪᴏɴ,

★ x + 4ʏ = 27 ......→(ɪ)

ᴀɴᴅ

★ x + 2ʏ = 21 .....→(ɪɪ)

ᴏɴ sᴜʙᴛʀᴀᴄᴛɪɴɢ (ɪɪ) ғʀᴏᴍ (ɪ), ᴡᴇ ɢᴇᴛ

2ʏ = 6

=> ʏ = 3

ɴᴇxᴛ, ᴘᴜᴛᴛɪɴɢ ʏ ɪɴ (ɪ), ᴡᴇ ɢᴇᴛ

x + 4(3) = 27

=> x = 15

ᴛʜᴇʀᴇғᴏʀᴇ,

★ x = ʀs. 15 ᴀɴᴅ ʏ = ʀs. 3

ᴛʜᴇʀᴇғᴏʀᴇ,

★ ғɪxᴇᴅ ᴄʜᴀʀɢᴇ = 15 ʀs.

ᴀɴᴅ

★ ᴄʜᴀʀɢᴇ ғᴏʀ ᴇᴀᴄʜ ᴇxᴛʀᴀ ᴅᴀʏ =

ʀs. 3

___________________________