Question

A forest fire covers twice the amount of forest as it did 3 days ago. 3 days ago, this fire covered 300 square miles and it continues to grow at the same rate. How many square miles will it cover 9 days from now? A. 9,600 sq miles B. 4,800 sq miles C. 3,200 sq miles D. 6,400 sq miles

Answer 1

D. 6400 sq miles in 9 days

Answer 2

The correct option is B) 4800 square miles.

Explanation:

Consider the provided information.

It is given that the fire covered 300 square miles in 3 days ago. And it continues to grow at the same rate.

Therefore, today it covers the twice of area it covers on yesterday.

The area covers by fire 2×300=600 square miles

Now the area covers after 3 days from today will be:

2×2×300 = 2×600 = 1200 square miles

The area covers after 3×2=6 days from today is:

2×2×2×300 = 2400 square miles

The area covers after 3×3=9 days from today is:

2×2×2×2×300 = 4800 square miles

Hence, the correct option is B) 4800 square miles.