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
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2
1 book=72/12=6
17books=6×17=102
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4
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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