Question

In 25 days, the earth picks up 6 multiply by 100000000 pounds of dust from atmosphere. how much does will it pick up in 15 days?

Answer 1

In 25 days earth picks up dust = 6 * 100000000 pounds
In one day earth picks up dust = [(6 * 100000000) / 25 ] pounds
                                                 =  24000000 pounds
In 15 days earth picks up dust = (15 * 24000000) pounds
                                                 =  360000000 pounds

Answer 2

Answer:

dust would be picked up in 15 days.

Solution:  

Dust picked up by Earth in 25 days =   pounds

In order to find picked up by the earth in 25 days, the value should be divided by 25.

Dust taken by Earth in 25 day =

Dust taken by Earth in 15 days =   

                                          

By division of 90 by 25 we get 3.6,

Dust picked up by Earth in 15 days =  pounds.