Question

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Answer 1

Answer:

x=60

Explanation:

Let x be the number of days taken by the earth to pick up 4.8×10

8

kg.

Days 15 x

Dust ( in kg ) 1.2×10

8

4.8×10

8

Since, the amount of dust picked up by the earth and the number of days are in direct variation, we get:

⇒

x

15

=

4.8×10

8

1.2×10

8

⇒ x=15×

1.2

4.8

⇒ x=60

∴ The required number of days will be