Question

find the cost of 3 notebook if 5 notebook cost rupees 350​

Answer 1

Answer :-

• The cost of 3 notebooks = Rs 210.

Given :

• The cost of 5 notebooks = Rs 350.

To find :-

• The cost of 3 notebooks.

Step-by-step explanation :-

First let's understand the trick to solve questions like this.

Lets understand!

In this question, we are going to use Unitary Method to first find the cost of 1 notebook, and then use it to find the cost of 3 notebooks.

Solution :-

Cost price of 5 notebooks = Rs 350.

So, cost price of 1 notebook = $\sf\dfrac{350}{5}$ = 70.

Cost price of 1 notebook = Rs 70.

So, cost price of 3 notebooks = Rs 70 × 3 = Rs 210.

Therefore, the cost price of 3 notebooks is Rs 210.

Answer 2

Answer:

# Solution = Rs. 210

Step-by-step explanation:

∆ Cost of 5 note books = Rs. 350

∆ Cost of 3 note books = ?

According to this question :

£ Cost of 3 note books :

= 350/5

= 70 × 3

= Rs. 210

Final Solution : Cost of 3 note books = Rs. 210

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