Question

a dozen notebooks cost 186. i. what is the cost of 8 such notebooks ii. hou many notebooks will cost 356.50


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Answer 1

Cost of one notebook is 15.5(186/12=15.5)

1. cost of 8 notebook=15.5*8=124

2. notebook can be bought by 356.50 is 356.50/15.5=23

Answer 2

Answer:-

$\green{\bigstar}$The cost of 8 notebooks = Rs. 124

$\green{\bigstar}$ Number of notebooks that cost Rs. 356.50 = 23

• Given:-

Cost of 1 dozen of notebooks = Rs. 186

• To Find:-

Cost of 8 such notebooks = ?

Number of notebooks that cost Rs. 356.50 = ?

• Solution:-

Cost of 1 dozen of notebooks is Rs. 186

1 dozen = 12

Hence,

Cost of 12 notebooks = Rs. 186

Cost of 1 notebook = $\dfrac{186}{12}$

→ Rs. 15.5

Case 1:-

Cost of 8 such notebooks = 15.5 × 8

→ Rs. 124

Case 2:-

Number of books that will cost Rs. 356.50 =

$\dfrac{356.50}{15.5}$

→ 23 notebooks

Therefore, the cost of 8 notebooks will be Rs. 124

and the number of notebooks that will cost Rs. 356.50 will be 23.