in a book store 60 identical books occupy a length of 1.5 on a shelf find (ii) the number of such books needed to completely occupy a shelf that is 80 cm long
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60 books occupy 1.5m of shelf
∴, 1 book occupies (1.5/60) m of shelf
∴, 200 books occupy {(1.5/60)×200} m of shelf
=(1.5/6)×20
=30/6
=5m of shelf Ans.
now, 5m=500cm is occupied by 200 books
∴, 1cm is occupied by (200/500) books
∴, 80cm is occupied by (200/500)×80 books
=(2/5)×80
=2×16
=32 books Ans.
Hope it helps u
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