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108 identical books have a mass of 30 kg. Find
(i) the mass of 150 such books,
(ii) the number of such books that have a mass
of 20 kg.

Respuesta :

Answer:

(i) 540kg

(ii) 5.56 (rounded off to 3 significant figures)

Step-by-step explanation:

[tex]108 \div 30 = 3.6kg[/tex]

[tex](i)3.6 \times 150 = 540kg[/tex]

[tex](ii)3.6 \times x = 20[/tex]

[tex]3.6x = 20[/tex]

[tex]x = \frac{20}{3.6} [/tex]

[tex]x = 5 \frac{5}{9} [/tex]

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