Question

Chinu bought 10 notebook of this same kind and a pen she paid 275 rupees find the cost of one notebook and a pen

Answer 1

Step-by-step explanation:

3 Pen +4 Notebook =110 rupees

Multiply by 5,

15 Pen +20 Notebook =550 rupees

7 Pen +5 Notebooks =170 rupees

Multiply by 4,

28 Pen +20 Notebook =680 rupees

15 Pen +20 Notebook =550 rupees

Equating and solving for Pen,

Cancelling notebook,

13 Pen =130 Hence,

Pen =10 rupees

Substituting,

3(10)+4 Notebook =110

4 Notebook =110−30 Hence,

Notebook =20 rupees

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Answer 2

Answer:

rs 27 for 1 book

rs 5 for a pen

Step-by-step explanation:

1 book = 27 rs

10 book = 27 * 10 rs

= 270 rs

a pen = 5 rs

total = 270+ 5= 275 rs