Question

A shelf can be packed from end to end with 30 large books or 45 small books.

Kevin already packed the shelf with 3 large books and 23 small books.
At most, how many more large books can Kevin pack the shelf with?
Ans:

Answer 1

11

Explanation:

since 30÷45 = 2/3 then

The space taken by a small book is equal to

the space taken by 2/3 a large book.

…………………………………………………

Calculating the number of large book corresponding to 23 small books :

= 23×(2÷3) + 3

= 18.333333333333 (large book)

Then ,Kevin can pack the shelf with (at most) : 30 - 19 = 11 more large books