Question

15 binders can bind 1400 books in 21 days. How many binders will be
required to bind 1600 books in 20 days? A. 14 B. 18 C. 24 D. 28
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ОА​

Answer 1

this is the answer of this question please mark as brainliest

Answer 2

The number of binders required to bind 1600 books in 20 days is 18.

Given:

15 binders need 21 days to bind 1400 books.

To Find:

The number of binders required to bind the 1600 books in 20 days.

Solution:

We are required to find the number of binders required to bind 1600 books in 20 days.

• The number of books is directly proportional to the number of days and number of binders.
• The number of days is inversely proportional to the number of binders.

Number of books = number of days×number of binders

From the above data, we have

1400 = 21×15  ------(1)

1600 = 20×x -------(2)

where x is the number of binders

By dividing equation(2) and equation(1)

20x/(21×15) = 1600/1400

20x = (16×21×15)/14

       = 360

x = 360/20

x = 18

Therefore, The number of binders required to bind 1600 books in 20 days is 18.

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