the weight of 72 books is 9kg. a-find the weight of 80such books. b-how many books will weight 6kg ?
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1
in 9 kg there comes 72 books
so in 1 kg there comes 72/9 books
in 1 kg there comes 8 books
so 80 books weight 10 kg
so in 1 kg there comes 72/9 books
in 1 kg there comes 8 books
so 80 books weight 10 kg
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a)weight of 72 book=9kg
9kg=1000*9=9000
weight of 1 book=9000/72=125 grams
125 grams=0.125 kg.
thus 1 book weight 0.125 kgs
b)let the no.of books weighting 6kg be x
x=6kg
one book weight=0.125kg
x books weight=0.125/6=48 books.
9kg=1000*9=9000
weight of 1 book=9000/72=125 grams
125 grams=0.125 kg.
thus 1 book weight 0.125 kgs
b)let the no.of books weighting 6kg be x
x=6kg
one book weight=0.125kg
x books weight=0.125/6=48 books.
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