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In 10 days earth picks up  2.6 × 108 kg of dust from the atmosphere. How much dusk will it pick up in 45 days?
  • a)
    1. 17 × 109
  • b)
    1.17 × 107
  • c)
    1.17 × 105
  • d)
    1.17 × 104
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
In 10 days earth picks up 2.6 × 108 kg of dust from the atmosphe...
Let the amount of dust picked up by the earth in 45 days be x pounds. 
Since the amount of dust picked up by the earth and the number of days are in direct variation, we have :
 Ratio of the dust picked up by the earth in pounds = ratio of the number of days taken 


Thus ,11.7x10^8 pounds of dust will be picked up by the earth in 45 days .

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