Question

108 identical books have mass of 30 kg
tell me the mass of 150 books

Answer 1

Answer:

540 KG

Step-by-step explanation:

MASS OF ONE BOOK=108/30=3.6 KG

MASS OF 150 BOOKS=3.6 *150=540 KG

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Answer 2

Answer:

Hey amte, here is your answer.

Step-by-step explanation:

(a)to get this, we just use ratio and proportion:

let x = weight of 150 books.

108 books : 30 kg = 150 books : x kg

we can thus rewrite this as

108/30 = 150/x

3.6 = 150/x

x = 150/3.6

x = 41.67 kg

(b) we also use ratio and proportion here:

let y = number of books that has weight of 20 kg.

108 books : 30 kg = y books : 20 kg

thus,

108/30 = y/20

3.6 = y/20

y = 3.6*20

y = 72 books

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