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The weight of 12 sheets of paper is 50 grams. How many sheets will weigh 500 grams?

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100

140

120

150

answer is C.

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Detailed Solution

Given,
The weight of 12 sheets of paper is 50 grams.
Let the number of sheets that weigh 500grams be x.
Then,

No. of sheets	12	x
Weight (in grams)	50	500

As this is the case of direct proportion, therefore the ratio will remain constant throughout the table that is,

1250 = x 500

Multiplying both sides by 500,

x = 1250 × 500

x = 12 × 10

x = 120

Hence, the number of sheets that weigh 500grams is 120.
Therefore, option 3 is correct.

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