A case of paper has a mass of 2000 g. A case of paper contains 10 reams of paper. One ream of paper is 500 sheets. What is the mass, in grams, of 50 sheets of paper?
Answers
Answer:
here is your answer
Explanation:
A sheet of paper has a mass of 2mg.”
Really? I don’t believe you.
Paper typically has a mass of 80 grammes per square metre. So an ordinary A4 sheet of paper has a mass of almost 5 grammes. That is 2500 times the mass of your “sheet of paper”.
But this is obviously a crazily unrealistic homework question, so whilst questioning the sanity of your teacher who set it, I’ll continue.
“A ream of paper has 500 sheets.”
OK, can’t argue with that.
“What is the mass of 3 reams of paper in grams, teragrams, and micrograms?”
Well 3 reams is clearly 1500 sheets. (I hope you could have worked that out for yourself!) So the mass of 1500 sheets of your mythical paper is 1500 x 2 mg, which I hope you’d have worked out is 3000 mg.
So first of all you want the answer in grammes. A gramme is 1000 mg, so it’s trivially easy to work out how many grammes 3000 mg is. I’ll let you do the maths this time!
What’s next, teragrammes? So a teragramme is 1,000,000,000,000 grammes. Divide the answer you just got (grammes) by 1,000,000,000,000 to get the number of teragrammes. Incidentally a teragramme can also be described as being a million tonnes - it’s a seriously huge mass!
Finally microgrammes. Well there are a million microgrammes (µg) in a gramme, so multiply the first answer you got by a million
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