Question

The green area in a city decreases by
12% every year. If the green area is
depleted 20,00.000 km , in a year. What
would be the green area left after 5
years?​

Answer 1

The green area left after 5 years would be 11993907.2 sq. km

Step-by-step explanation :

Let the current green area is P sq. km

Then,

P × (1 - 12/100)^1 = 20000000

or, P × 88/100 = 20000000

or, P × 11/25 = 10000000

or, P = 250000000/11

So current green area if 250000000/11 sq. km

Thus the green area left after 5 years would be

= 250000000/11 × (1 - 12/100)^5 sq. km

= 250000000/11 × (88/100)^5 sq. km

= 11993907.2 sq. km

Answer 2

Answer:

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