an empty box has a mass of 75 g. David packs 12 jars of jam, each mass 380 g into the box. What is the total mass of 9 such boxes of jam ?

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an empty box has a mass of 75 g. David packs 12 jars of jam, each mass 380 g into the box. What is the total mass of 9 such boxes of jam ?

Jawaban:

1 box = 12 jars of jam

the mass of 1 box of jam = 75g + (12 × 380g)

= 75g + 4.560g

= 4.635g

total mass = 9 × 4.635g

= 41.715g

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