Question

the weight of 60 books is 8 kg. what is the weight of 256 such books? How many such books will weight 5 kg?(hint : first find the weight of one book and then multiply it with the required number of books. secondly find the number of books that weight 1 kg and then multiply it with the required weight of the books.

Answer 1

60 ÷ 8= 7.7
7.7×256=19712 kg
5kg=30 books

Answer 2

we have,

wt of 60 books=8kg
weight of one book=60÷8=7.5kg
Also,
weight of 256 such books =256×7.5=1,920kg

we get,
no. of books which will weigh 5 kg=5/7.5=0.66667books



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