Question

the cost of 15 notebooks is RS 144. find the cost of one such notebook

Answer 1

Answer:

Rs. 9.6

Step-by-step explanation:

By using the unitary method,

The cost of 15 notebooks is Rs. 144

The cost of one notebook = ?

When we equate it

15  →  144

1    →  

⇒ x = $\frac{144 x 1 }{ 15 }$

       = 144 ÷ 15

       =  9.6

∴ One notebook costs rupees 9.6

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Answer 2

The cost of one notebook is Rs 9.6

Step-by-step explanation:

Given:

The cost of 15 notebooks is Rs.144

To find:

cost of one notebook

Solution:

We know the cost of 15 notebooks

And that is given as Rs.144

Recalling the concept of ratio and proportion for this sum

When one value is offered we can find the other relating value to it

If 15 notebooks cost 144, then

1 notebook will cost = 144/15

∴ The cost of 1 notebook = Rs 9.6

Thus, we use the division process to find the cost of one such notebook

Hence, the cost of one such notebook is Rs.9.6

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