Question

Hii friends
Please give answer with explanation .

( Chapter - Ratio and proportion with unitary method )​

Answer 1

Answer:

Rs = Indian Rupee = 1.6¢ U.S.)

I will start by saying that you should do your own homework; you are lucky I am feeling charitable tonight.

To answer the question, we need to know how much a pen costs and how much a pencil costs. For this we use some deductive reasoning:

1. Pencils are commonly less expensive than pens

2. There are 8 items, and 14 is not divisible by 8.

3. It can be assumed that the prices are in whole units (so no fractions of a Rs).

So we will separate the two groups:

5 pencils

3 pens

The minimum price of any item is 1 Rs, so if we assume the pencils cost Rs 1 each, that means that the three pens will cost Rs 9.

9 is divisible by 3, so we can determine with a fair degree of certainty that:

Each pencil costs Rs 1 and

Each pen costs Rs 3

Now it is a simple matter of multiplying 10 x 3 (pens times Rs) and adding this result to 12 x 1 (pencils x Rs):

30 + 12 = 42

So if 3 pens and five pencils cost Rs 14, then 10 pens and 12 pencils will cost Rs 42.

Do not forget to credit the one who has given you the answer when you write it in your homework, otherwise you are cheating.

Answer 2

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