Question

A dozen identical books are stacked one above the other to a height of 72 cm if five more books are added to the stack what will be the heighyt of the stack

Answer 1

1 book=72/12=6

17books=6×17=102

Answer 2

The height of the stack is 102 cm.

Explanation:

Given : A dozen identical books are stacked one above the other to a height of 72 cm.

Since 1 dozen = 12

Therefore ,  the height of 12 books = 72 cm

⇒ Height of each book= (height of 12 books) ÷ 12

= 72 cm ÷ 12 = 6 cm

Height of 5 books = 5 x (Height of each book)

= 5 x (6) = 30 cm

If five more books are added to the stack  , then the height of the stack = height of 1 dozen books + Height of 5 books

=  72 cm+ 30cm =  102 cm

Hence, the height of the stack is 102 cm.

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