Q.12] The weight of 72 books in 144kg. What is the weight of 10 such books?
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the weight of 72 books in 144kg
the weight of 1 book =144/72=2kg
1 book =2 kg
10 book =2×10=20kg
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Answer:
let the weight of 10 books be x.
72 : 144 :: 10 : x
Product if extremes = Product of Means
72 × x = 144 × 10
72x = 1440
x = 1440/72
x = 20
weight of 10 such books is 20kg.
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