Question

14) If the cost of 20 books is 7 180, how much will 15 books cost?

Answer 1

Answer:

SIMPLE

TOTAL NUMBER OF BOOKS = 20

TOTAL COST OF THE BOOKS = 7,180

FIND 15 BOOKS = ?

Step-by-step explanation:

1 BOOK = NUMBER OF BOOKS / COST OF THE BOOK

1 BOOK = 20 / 7,180 = 359

SO , 15 BOOKS = 1 BOOK PRICE × TOTAL NUMBER OF BOOKS

357 × 15 = 5,385

THUS , 15 BOOKS PRICE IS 5,385 .

HOPE IT HELPS YOU

Answer 2

In context to question asked,

We have to determine the cost of 15 books.

As per question,

Cost of 20 books is 7180.

So, for determining the cost of 15 books we will first determine the cost of 1 book and then multiply it by 15

So, cost of one book will be $=\frac{7180}{20} = Rs.\:359$

So, cost of 15 books will be $=(359 \times 15) = Rs.\:5385$

So, cost of 15 books will be Rs. 5385