Question

Sanjana bought 5 notebook and 2 pens for Rs 120.He told to guess cost of each notebook and pen of his friends Mohan and Anil.sanjana has given the clue that both the cost are natural numbers and divisible by 5 such that the cost of a notebook is greater then that of a pen .Now ,Mohan and anil tried to guess. Mohan said that price of each notebook could be RS 18.then 5 notebook would cost RS 90.the two pens cost RS 30.and each pen could be for Rs 15.Anil felt that RS 18 for one notebook was to little . It should be at least RS 20.Then the price of each pen would be RS 10.
Q- Let the cost of one notebook be RS x and that of one pen be RS Y then the linear equation in two variable for the given situation is.
Q-Check whose guess is correct.
Q-If Sanjana purchased 8 notebooks and 4 pens .How much money he has to pay to the shopkeeper.

Answer 1

Answer:

Let the cost of a notebook be Rs. x and that of a pen be Rs. y.

Given the cost of a notebook is twice the cost of a pen.

Then x=2y

or, x−2y=0.

This is the required linear equation in two variable.

Answer 2

Answer:2

1. 5x+2y =120

2.anil's guess is correct

3.200

Step-by-step explanation:

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