Question

If the cost of 5 copies of a book is ₹12.5 what is the cost of a dozen copies of the some books

Answer 1

✬ Cost Price = Rs 30 ✬

Step-by-step explanation:

Given:

• Cost of 5 copies is Rs 12.5

To Find:

• What will be the cost of one dozen such copies of book ?

Solution: Let the cost of one dozen copies be Rs x.

➼ Cost of 5 copies of book = Rs 12.5

∴ C.P of 1 copy of book = Total CP of 5 copies/Number of copies

➟ C.P of 1 copy of book = 12.5/5

➟ C.P of 1 copy of book = Rs 2.5

Now, As we know that

• 1 dozen = 12

So, we need to find the cp of 12 copies of book

➭ CP of 12 copies = x = C.P of 1 copy(12)

$\implies{\rm }$ x = Rs 2.5 $\times$ 12

$\implies{\rm }$ x = Rs 30

Hence, the cost of one dozen such copies of book will be Rs 30.

Answer 2

☕ Given :-

• Cost Of Five Copies = ₹12.5

☕ To Find :-

• Cost of a dozen copies of same books.

☕ Solution :-

Cost Of Five Copies = ₹ 12.5.

Cost Of One Copy = 12.5 ÷ 5 = ₹2.5

So, We have the cost of one copy.

Now, Finding the cost of Dozen Copies.

1 Dozen = 12

So, we need to find the cost of 12 copies.

Cost Of Dozen Copies = Cost Of 1 Copy × 12

Cost of Dozen Copies = 2.5 × 12 = ₹30.

Hence, The Cost Of Dozen Copies Is ₹ 30.