Question

In 12 days the Earth picks up 1.8 × 10×8 kg of dust from the atmosphere.In how many days will it pick up 7.2×10×8 kg of dust ?

Answer 1

Step-by-step explanation:

in 12 days - 144kg

therefore 144 kg - 12 days

1 kg - 12÷144

1 kg - 1/12

576kg - 1/12× 576

- 48 days

Answer 2

Answer:

48

Step-by-step explanation:

Given, Earth picks up 1.8 × 10^8 kg of dust in 12 days.

here, if dust increases then days also increases.

So, this is a direct relation problem.

let the number of days be x.

Then, 1.8×10^8 / 12 = 7.2× 10^ 8/x

Or, x = (7.2× 10 ^8 × 12) /1.8×10^8

Or, x= 48