7. The cost of a dozen pens is 690 and the cost of
8 books is 1,656. Find the ratio of the cost of a pen
to the cost of a book.
(2)
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Step-by-step explanation:
PENS:
The cost of 12 pens = 690
The cost of 1 pen = 690/12
=57.5
Rounding off,
=58
BOOKS:
The cost of 8 books = 1656
The cost of 1 book = 1656/8
=207
The ratio of a book is to a pen is >> 207:58
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