In 15 days, the earth picks up
kg of dust from the atmosphere. In how many days it will pick up
kg of dust?
Let the number of days is 
Weight of dust (pounds) | 1.2 × 108 | 4.8 × 108 |
Time (days) | 15 |
|
On cross multiplication, we get
Therefore the number of days required to pick up the dust is 60 days
23