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Question

Answer

If length of the book is u cm, width of the book is (25 – u ) cm. 

By inspection ,

71 = 3u + 2( 25 – u)

71 = 3u + 50 -2u

u = 21

width of the book = 4 cm

71/4 = 17 3/4

At most 17 books can be placed upright on the empty shelf.

0 Replies 2 Likes ✔Accepted Answer

first 71-25-25=21 (to find to find the longer part of the book)

next 25-21 (to find the shorter part of the book)

then 71/4=17 (you got the answer)

0 Replies 2 Likes